Breast Cancer and Pain: Understanding the Causes

Breast Cancer and Pain: What Patients and Survivors Need to Know

Breast Cancer and Pain: What Patients and Survivors Need to Know. Breast cancer pain can have many causes. The cancer itself, surgery, chemotherapy, radiation therapy, endocrine therapy, nerve damage, lymphedema, and long-term treatment side effects can all contribute to pain.

The most important first step is to determine what is causing the pain.

This may sound obvious, but breast cancer survivors can experience very different types of pain requiring very different solutions. Shoulder pain after surgery is not the same as chemotherapy-induced peripheral neuropathy. Aromatase inhibitor joint pain is not the same as radiation fibrosis. Painful intercourse caused by treatment-induced menopause requires a different approach than chronic nerve pain following mastectomy.

For this reason, simply taking more pain medication is not always the best answer.

The goal should be to identify the cause of the pain and then develop an individualized, multimodal pain-management plan.

This article explains the most common causes of breast cancer pain, evidence-based conventional and complementary therapies, and when new or worsening pain should be evaluated promptly.

I am a long-term survivor of an incurable blood cancer called multiple myeloma.

Though I have been in complete remission from my blood cancer since 1999, I have developed long-term side effects that cause joint, muscle, nerve, and bone pain. I spend as much time and money managing my therapy-induced pain as I do managing my health. I hope the post below helps you manage your own cancer pain.

Like most topics on PeopleBeatingCancer.org, I believe that patient education for both conventional and evidence-based non-conventional therapies is the key to managing most cancer-related problems.

Scroll down and post a question or comment if there is anything you’d like to know about cancer and pain.

Good luck,

David Emerson

Concepts Central to Managing Your Cancer

Pain for Specific Types of Cancer

The First Question: What Is Causing Your Pain?

Pain in a breast cancer patient or survivor should not automatically be dismissed as “just part of treatment.”

The National Cancer Institute explains that cancer pain may result from either the cancer itself or its treatment, and that pain-management plans should be individualized according to symptoms and their underlying cause.

For cancer survivors with new pain, ASCO guidance also emphasizes evaluating possible causes, including recurrent disease, a second malignancy, and late treatment effects when clinically appropriate.

Common causes of pain in breast cancer patients and survivors include:

Pain following lumpectomy or mastectomy
Post-mastectomy pain syndrome
Nerve injury
Axillary lymph node surgery
Scar tissue and restricted shoulder movement
Chemotherapy-induced peripheral neuropathy
Radiation-related skin, soft-tissue, or nerve injury
Lymphedema-related discomfort
Aromatase inhibitor-associated joint and muscle pain
Bone or musculoskeletal pain
Pain related to metastatic breast cancer
Painful intercourse and other treatment-related sexual side effects

The key message is simple:

Breast cancer pain is not one problem. It is a collection of possible problems with different causes and different solutions.

1. Pain Following Breast Cancer Surgery

Breast surgery can cause short-term postoperative pain, but for some women, pain persists long after surgical healing.

Persistent pain following breast cancer surgery may involve:

Burning
Shooting or stabbing sensations
Numbness
Tingling
Hypersensitivity
Tightness or pulling
Pain in the breast, chest wall, armpit, shoulder, or upper arm

One PBC article, Pain Following Breast Cancer Surgery, discusses the important issue of persistent postsurgical pain. Research cited in that article found that pain and sensory disturbances could remain clinically significant years after treatment, with axillary lymph node dissection associated with a greater likelihood of persistent pain than sentinel lymph node procedures.

Potential approaches

Depending on the cause, treatment may include:

Physical therapy
Occupational therapy
Shoulder and range-of-motion rehabilitation
Scar management
Exercise
Neuropathic pain medications
Non-opioid pain medications
Acupuncture
Massage
Referral to a pain-management specialist

The best treatment depends on whether the pain is primarily related to surgery, nerve injury, restricted movement, scar tissue, lymphedema, or another problem.

2. Post-Mastectomy and Nerve Pain

Damage or irritation of nerves during breast or lymph-node surgery can produce neuropathic pain.

Neuropathic pain often feels different from ordinary muscle or joint pain. Patients may describe:

Burning
Electric-shock sensations
Pins and needles
Tingling
Numbness
Extreme sensitivity to touch

This distinction matters because neuropathic pain may respond poorly to conventional pain relievers alone.

A comprehensive pain assessment should consider the characteristics of the pain, its functional effects, associated distress, treatment history, and likely underlying mechanism.

Potential treatments may include physical rehabilitation, medications specifically used for neuropathic pain, and selected integrative therapies.

3. Chemotherapy-Induced Peripheral Neuropathy

Certain chemotherapy drugs used to treat breast cancer can damage peripheral nerves.

Symptoms of chemotherapy-induced peripheral neuropathy, or CIPN, may include:

Burning pain
Tingling
Numbness
Pins-and-needles sensations
Pain in the hands or feet
Balance problems
Difficulty walking
Difficulty with buttons, writing, or other fine motor tasks

CIPN can improve after chemotherapy ends, but for some survivors it becomes a long-term or chronic problem.

For a more detailed discussion, see PBC’s Chemotherapy-Induced Peripheral Neuropathy in Breast Cancer. The article focuses specifically on why neuropathy occurs in breast cancer treatment, the symptoms patients may experience, and evidence-based strategies for reducing its impact.

ASCO survivorship guidance recommends assessing breast cancer survivors for peripheral neuropathy and contributing factors. It identifies physical activity as one possible intervention and duloxetine as an evidence-based medication option for certain patients with painful neuropathy.

The Society for Integrative Oncology and ASCO guideline also states that acupuncture may be offered for chemotherapy-induced peripheral neuropathy, although the evidence quality supporting this recommendation is limited.

The important point: persistent tingling, numbness, or burning after chemotherapy should not simply be ignored.

4. Aromatase Inhibitor Joint and Muscle Pain

Endocrine therapy can save lives, but medications such as aromatase inhibitors may cause significant musculoskeletal symptoms.

Pain may affect the:

Hands
Wrists
Knees
Hips
Shoulders
Back

Some women experience stiffness, particularly after resting or upon waking in the morning.

This is an especially important cause of breast cancer survivorship pain because patients may struggle with whether they can continue a therapy prescribed to reduce the risk of recurrence.

The SIO-ASCO integrative oncology guideline specifically recommends acupuncture for aromatase inhibitor-related joint pain, based on intermediate-quality evidence and a moderate-strength recommendation. Yoga may also be offered, although the evidence supporting that recommendation is weaker.

Other approaches may include:

Physical activity
Physical therapy
Exercise and strength training tailored to the individual
Acupuncture
Evaluation for other causes of joint pain
Discussion with the oncology team before changing endocrine therapy

Do not stop prescribed endocrine therapy on your own because of pain. Tell your oncology team. There may be ways to manage symptoms or modify treatment.

5. Radiation-Related Pain

Radiation therapy can cause temporary discomfort during treatment, but some patients may also develop longer-lasting effects involving skin, soft tissue, muscles, nerves, or fibrosis.

Possible problems include:

Skin discomfort
Tightness
Chest-wall discomfort
Shoulder stiffness
Soft-tissue fibrosis
Restricted range of motion
Less commonly, nerve-related symptoms

PBC’s article Life After Breast Cancer: Navigating Survivorship discusses chronic pain as a potential long-term survivorship issue and identifies surgery, nerve injury, radiation, neuropathy, musculoskeletal changes, aromatase inhibitors, scar tissue, and lymphedema as possible contributors.

Again, the cause matters.

Physical therapy, rehabilitation, exercise, and other targeted interventions may be more useful than relying exclusively on pain medication.

6. Lymphedema, Arm Discomfort, and Pain

Breast cancer treatment involving lymph nodes can increase the risk of lymphedema.

Lymphedema may cause:

Swelling
Heaviness
Tightness
Aching
Discomfort
Reduced range of motion

Pain in the arm or shoulder may also have other causes, including nerve injury, musculoskeletal problems, or treatment-related changes.

This is one reason why persistent arm pain deserves evaluation rather than self-diagnosis.

Depending on the cause, referral to a lymphedema specialist, physical therapist, or occupational therapist may be appropriate. Breast cancer survivorship guidance specifically recognizes the importance of identifying the underlying cause of pain and referring patients to appropriate specialists when needed.

7. Painful Intercourse After Breast Cancer

Pain following breast cancer treatment is not limited to the breast, chest, arms, or joints.

Chemotherapy, endocrine therapy, treatment-induced menopause, and reduced estrogen levels can contribute to vaginal dryness, vulvovaginal changes, pelvic floor dysfunction, and painful intercourse.

PBC discusses this important but often overlooked issue in Dyspareunia, Painful Intercourse, in Breast Cancer. Potential approaches discussed include lubricants and moisturizers, pelvic floor physical therapy, management of neuropathic pain when appropriate, and individualized discussions about hormonal and nonhormonal therapies.

Sexual pain is a quality-of-life issue.

Breast cancer survivors should not feel that they simply have to live with it.

8. Complementary and Integrative Therapies for Breast Cancer Pain

Integrative therapies should not replace appropriate evaluation or treatment of the underlying cause of pain. However, some complementary therapies have sufficient evidence to be included as part of a broader pain-management plan.

The joint SIO-ASCO guideline reviewed 227 studies addressing integrative approaches to cancer pain.

Depending on the type of pain, evidence-based options include:

Acupuncture

The guideline recommends acupuncture for aromatase inhibitor-related joint pain and states that acupuncture may be offered for general cancer-related or musculoskeletal pain.

Massage

Massage may be offered to some patients experiencing chronic pain following breast cancer treatment, according to the SIO-ASCO guideline, although the supporting evidence is lower quality than for some other recommendations.

Yoga

Hatha yoga may be offered to some patients experiencing pain after breast cancer treatment. Yoga may also help certain patients experiencing aromatase inhibitor-related joint pain.

Physical Activity and Rehabilitation

Exercise and physical activity can play an important role in managing musculoskeletal symptoms, maintaining function, and supporting recovery. The appropriate program depends on the patient’s treatment history, physical limitations, pain source, and other medical issues.

Complementary Pain Therapies

Complementary pain therapies for breast cancer are non-pharmacological approaches used alongside standard medical treatments to help reduce discomfort, joint pain, and muscle tension. [1, 2]

Acupressure and Reflexology

The SIO-ASCO guideline states that acupressure or reflexology may be offered for some patients experiencing pain during systemic cancer treatment.

PBC’s Breast Cancer – Treating Side Effects provides a broader discussion of breast cancer treatment side effects, including pain from surgery, neuropathy, aromatase inhibitors, and radiation-related treatment effects.

9. Pain Medication May Be Necessary

Integrative and rehabilitative therapies are not intended to suggest that patients should avoid appropriate pain medication.

The National Cancer Institute emphasizes that pain control is an important part of cancer care and that patients should tell their healthcare team when their current pain-management plan is not working.

Depending on the cause and severity of pain, treatment may involve:

Acetaminophen
Anti-inflammatory medications when appropriate
Neuropathic pain medications
Other non-opioid medications
Opioids for appropriately selected patients with moderate-to-severe cancer-related pain

ASCO’s opioid guideline recommends opioids for adults with moderate-to-severe pain related to cancer or active cancer treatment when they are not contraindicated, with individualized dosing and monitoring.

Pain management should not be an either/or decision.

For many patients, the best approach is multimodal: treating the underlying cause while combining medication, rehabilitation, exercise, psychological support, and evidence-based complementary therapies when appropriate.

When Should Breast Cancer Pain Be Evaluated?

Contact your healthcare team about new, persistent, worsening, or unexplained pain.

Evaluation may be particularly important when pain:

Is severe or rapidly worsening
Prevents normal activity or sleep
Is associated with new weakness or numbness
Is accompanied by significant swelling
Develops as new bone pain
Occurs with unexplained weight loss or other concerning symptoms
Does not respond to the current treatment plan

New pain in a cancer survivor should not automatically be assumed to be recurrence—but neither should it automatically be dismissed as a normal consequence of aging or previous treatment.

The right question is:

What is causing this pain?

ASCO guidance recommends evaluating cancer survivors with new-onset pain for potential recurrent disease, second malignancy, or late effects of treatment when clinically warranted.

The PeopleBeatingCancer Evidence Rating

Therapy or Approach	Evidence Rating	What the Evidence Suggests
Identify and treat the underlying cause	Strong	Essential first step in effective pain management
Acupuncture for AI-related joint pain	Strong/Moderate	Specifically supported by the SIO-ASCO guideline
Acupuncture for general cancer or musculoskeletal pain	Moderate	May provide meaningful benefit for selected patients
Physical activity and rehabilitation	Moderate	Can improve function and help manage several causes of pain
Massage for chronic post-treatment breast cancer pain	Limited/Moderate	May help selected patients; evidence is less robust
Hatha yoga	Limited/Moderate	May help pain and function after breast cancer treatment
Acupressure or reflexology	Limited/Moderate	May help selected patients, particularly during systemic therapy
Neuropathic pain medication	Moderate to Strong	Depends on the specific medication and type of neuropathic pain
Opioid therapy for moderate-to-severe cancer pain	Strong	Important option when clinically indicated
Dietary supplements or “natural” pain remedies	Insufficient/Variable	Evidence and safety vary substantially by product

How to interpret these ratings: The PeopleBeatingCancer Evidence Rating is an editorial summary of the quality and consistency of available clinical evidence. It is not a substitute for individualized medical advice. A therapy with a lower evidence rating may still help an individual patient, while a highly rated therapy may not be appropriate for everyone.

The Bottom Line: Breast Cancer Pain Has Many Causes—and Many Possible Solutions

If you are living with breast cancer pain, the first step is not necessarily to find a stronger pain medication.

The first step is to determine why you hurt.

Your pain could be caused by:

Surgery
Nerve injury
Chemotherapy-induced neuropathy
Radiation
Lymphedema
Scar tissue
Restricted movement
Aromatase inhibitor therapy
Musculoskeletal problems
Sexual side effects
Active cancer

Once the likely cause is identified, treatment can become much more specific.

For some patients, the answer may be physical therapy. For others, it may be treatment for neuropathic pain, acupuncture, exercise, massage, medication, lymphedema therapy, pelvic floor therapy, or a combination of several approaches.

You do not have to choose between conventional and complementary pain management.

The goal is to use the safest, most evidence-based therapies available to address the cause of pain, improve function, and improve quality of life.

As a long-term cancer survivor, I know that surviving cancer and living well after cancer are not always the same thing.

Pain can affect sleep, mobility, exercise, relationships, sexuality, work, and mental health.

Research and Evidence

NCI: Pain and Cancer — Overview of cancer pain, causes, assessment, and treatment.
SIO-ASCO Guideline: Integrative Medicine for Pain Management in Oncology — Evidence-based recommendations for acupuncture, massage, yoga, acupressure, reflexology, and other integrative approaches to cancer pain.
ASCO: Management of Chronic Pain in Survivors of Adult Cancers — Guidance on evaluating chronic pain and new pain in cancer survivors.
ASCO: Use of Opioids for Adults With Pain From Cancer or Cancer Treatment — Evidence-based guidance on opioid therapy for moderate-to-severe cancer-related pain.
SIO-ASCO Pain Guideline Recommendations for Breast Cancer Pain — Specific recommendations for aromatase inhibitor-related joint pain, chronic pain after breast cancer treatment, and pain after cancer therapy.
ACS-ASCO Breast Cancer Survivorship Care Guideline Summary — Recommendations addressing pain, musculoskeletal symptoms, neuropathy, physical activity, acupuncture, and referral.

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