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Underarm Numbness After Mastectomy

Learn why underarm numbness may occur after mastectomy, how long it might last, and what steps may help you manage it.

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Written by Dr.Sonia Bhatt

Last updated on 11th Jul, 2025

Introduction

Undergoing a mastectomy is a significant part of breast cancer treatment. While the procedure may be life-saving, it often comes with physical side effects. One common issue that many individuals experience is underarm numbness. Though it can feel concerning, this side effect may be temporary and is typically manageable with proper care and awareness.

This article will help you understand why underarm numbness happens, how long it may last, and what you can do to cope with it.

Why Does Underarm Numbness Occur After Mastectomy?

During a mastectomy, surgeons often remove lymph nodes from the underarm area (axilla) to check if cancer has spread. This procedure is called an axillary lymph node dissection (ALND) or sentinel lymph node biopsy (SLNB).

Nerves in the underarm and chest area can get stretched, damaged, or cut during surgery, leading to numbness or tingling. The most commonly affected nerve is the intercostobrachial nerve, which provides sensation to the underarm and inner arm.

Common Causes of Numbness:

  • Nerve Damage: Temporary or permanent nerve injury during surgery.

  • Swelling or Scar Tissue: Post-surgical swelling or scar tissue pressing on nerves.

  • Radiation Therapy: If given after surgery, it may contribute to nerve irritation.

Symptoms of Underarm Numbness

Numbness after mastectomy can vary from person to person. The symptoms can be temporary or, in some cases, long-lasting. You may experience:

  • Loss of sensation in the underarm or upper inner arm

  • Tingling or pins-and-needles sensation

  • Heightened sensitivity to touch

  • A feeling of heaviness or weakness in the arm

Consult Top Specialists for Personalised Health Advice

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Dr. Shailaja L, Obstetrician and Gynaecologist

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Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

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Dr. Ritika Khurana, Obstetrician and Gynaecologist

Dr. Ritika Khurana

Obstetrician and Gynaecologist

16 Years • MBBS, DGO(GYNAECOLOGY AND OBSTETRICS)

Pune

Dr Rupali and Dr Ritika, Pune

875

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How Long Does Underarm Numbness Last?

Recovery timelines vary, but some general patterns are seen depending on the surgical approach and individual healing rates.

Typical recovery timeline:

  • First Few Weeks: Numbness is most noticeable.

  • 3-6 Months: Some sensation may return as nerves heal.

  • Beyond 1 Year: If numbness persists, it may be permanent, but discomfort often lessens over time.

Managing Underarm Numbness After Mastectomy

While complete recovery may take time, these strategies can help:

1. Gentle Massage & Physical Therapy

  • Light massage can improve blood flow and reduce scar tissue.

  • A physiotherapist can guide you on safe exercises to regain arm mobility.

2. Moisturise & Protect the Area

  • Since numb skin is less sensitive, you may not notice cuts or burns.

  • Use fragrance-free moisturisers and avoid hot water or direct heat on the area.

3. Wear Comfortable Clothing

  • Avoid tight sleeves or bras that press on the underarm.

  • Soft, seamless fabrics can reduce irritation.

4. Stay Active (With Caution)

  • Gentle stretching and arm exercises prevent stiffness.

  • Avoid heavy lifting until your doctor approves.

5. Pain Management

  • Over-the-counter pain relievers, like acetaminophen, may help.

  • If tingling is bothersome, your doctor may suggest nerve pain medications.

6. Emotional Support

Numbness can be frustrating—talk to a counsellor or support group if needed.

When to See a Doctor?

While numbness is common, contact your doctor if you notice:

  • Sudden worsening of pain or swelling.

  • Signs of infection such as redness, warmth, and fever.

  • Severe arm swelling (lymphedema).

  • Loss of arm movement or severe weakness.

If you're concerned about persistent numbness, consult a specialist to explore further treatment options like nerve therapy or medications.

Can Underarm Sensation Return?

In many cases, partial sensation returns over months or years as nerves regenerate. However, some numbness may remain permanently. The good news is that most people adapt well over time.

Final Thoughts

Underarm numbness after mastectomy is a common but manageable side effect. While it can be unsettling, understanding why it happens and taking proactive steps can help improve comfort and mobility.

If you're struggling with persistent numbness or discomfort, don’t hesitate to consult a healthcare professional. At Apollo 24|7, you can book an appointment with an oncologist or physiotherapist for personalised guidance.

Consult Top Gynaecologists

Dr Swatika Kumari, Obstetrician and Gynaecologist

Dr Swatika Kumari

Obstetrician and Gynaecologist

19 Years • MBBS, DGO, DNB Obstetrics & Gynaecology

Nashik

Apollo 24|7 Clinic - Maharashtra, Nashik

660

64 Cashback

Dr. Priyanka Surisetty, Obstetrician and Gynaecologist

Dr. Priyanka Surisetty

Obstetrician and Gynaecologist

8 Years • MBBS, DGO

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

recommendation

81%

(150+ Patients)

600

54 Cashback

Dr. Shailaja L, Obstetrician and Gynaecologist

Dr. Shailaja L

Obstetrician and Gynaecologist

16 Years • MBBS, MS

Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

660

64 Cashback

Dr. Ritika Khurana, Obstetrician and Gynaecologist

Dr. Ritika Khurana

Obstetrician and Gynaecologist

16 Years • MBBS, DGO(GYNAECOLOGY AND OBSTETRICS)

Pune

Dr Rupali and Dr Ritika, Pune

875

700

Consult Top Specialists for Personalised Health Advice

Dr Swatika Kumari, Obstetrician and Gynaecologist

Dr Swatika Kumari

Obstetrician and Gynaecologist

19 Years • MBBS, DGO, DNB Obstetrics & Gynaecology

Nashik

Apollo 24|7 Clinic - Maharashtra, Nashik

660

64 Cashback

Dr. Priyanka Surisetty, Obstetrician and Gynaecologist

Dr. Priyanka Surisetty

Obstetrician and Gynaecologist

8 Years • MBBS, DGO

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

recommendation

81%

(150+ Patients)

600

54 Cashback

Dr. Shailaja L, Obstetrician and Gynaecologist

Dr. Shailaja L

Obstetrician and Gynaecologist

16 Years • MBBS, MS

Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

660

64 Cashback

Dr. Ritika Khurana, Obstetrician and Gynaecologist

Dr. Ritika Khurana

Obstetrician and Gynaecologist

16 Years • MBBS, DGO(GYNAECOLOGY AND OBSTETRICS)

Pune

Dr Rupali and Dr Ritika, Pune

875

700

Dr. Neha Jain, Obstetrician and Gynaecologist

Dr. Neha Jain

Obstetrician and Gynaecologist

18 Years • MBBS , DGO (Obstetrics & Gynaecology)

New Delhi

Dr. Jain's Pathlab and Clinic, New Delhi

1125

1000

No Booking Fees

Consult Top Gynaecologists

Dr Swatika Kumari, Obstetrician and Gynaecologist

Dr Swatika Kumari

Obstetrician and Gynaecologist

19 Years • MBBS, DGO, DNB Obstetrics & Gynaecology

Nashik

Apollo 24|7 Clinic - Maharashtra, Nashik

660

64 Cashback

Dr. Priyanka Surisetty, Obstetrician and Gynaecologist

Dr. Priyanka Surisetty

Obstetrician and Gynaecologist

8 Years • MBBS, DGO

Visakhapatnam

Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam

recommendation

81%

(150+ Patients)

600

54 Cashback

Dr. Shailaja L, Obstetrician and Gynaecologist

Dr. Shailaja L

Obstetrician and Gynaecologist

16 Years • MBBS, MS

Bangalore

Apollo 24|7 Clinic - Karnataka, Bangalore

660

64 Cashback

Dr. Ritika Khurana, Obstetrician and Gynaecologist

Dr. Ritika Khurana

Obstetrician and Gynaecologist

16 Years • MBBS, DGO(GYNAECOLOGY AND OBSTETRICS)

Pune

Dr Rupali and Dr Ritika, Pune

875

700

Dr. Neha Jain, Obstetrician and Gynaecologist

Dr. Neha Jain

Obstetrician and Gynaecologist

18 Years • MBBS , DGO (Obstetrics & Gynaecology)

New Delhi

Dr. Jain's Pathlab and Clinic, New Delhi

1125

1000

No Booking Fees

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