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.
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
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
Consult Top Specialists for Personalised Health Advice
Dr. Veena H
Obstetrician and Gynaecologist
16 Years • MBBS DGO
Bangalore
Apollo 24|7 Clinic - Karnataka, Bangalore
Dr Swatika Kumari
Obstetrician and Gynaecologist
19 Years • MBBS, DGO, DNB Obstetrics & Gynaecology
Nashik
Apollo 24|7 Clinic - Maharashtra, Nashik
Dr. Priyanka Surisetty
Obstetrician and Gynaecologist
8 Years • MBBS, DGO
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr. Asha Rani Singh
Obstetrician and Gynaecologist
24 Years • MBBS DGO
Delhi
Dr Asha Rani Singh Clinic, Delhi
Dr. Parul Sharma
Obstetrician and Gynaecologist
8 Years • MBBS, MS (Obstetrics & Gynaecology)
New Delhi
THE DOCTORS NESST, New Delhi
Consult Top Gynaecologists
Dr. Veena H
Obstetrician and Gynaecologist
16 Years • MBBS DGO
Bangalore
Apollo 24|7 Clinic - Karnataka, Bangalore
Dr Swatika Kumari
Obstetrician and Gynaecologist
19 Years • MBBS, DGO, DNB Obstetrics & Gynaecology
Nashik
Apollo 24|7 Clinic - Maharashtra, Nashik
Dr. Priyanka Surisetty
Obstetrician and Gynaecologist
8 Years • MBBS, DGO
Visakhapatnam
Apollo 24|7 Clinic - Andhra Pradesh, Visakhapatnam
Dr. Asha Rani Singh
Obstetrician and Gynaecologist
24 Years • MBBS DGO
Delhi
Dr Asha Rani Singh Clinic, Delhi
Dr. Parul Sharma
Obstetrician and Gynaecologist
8 Years • MBBS, MS (Obstetrics & Gynaecology)
New Delhi
THE DOCTORS NESST, New Delhi
