Underarm Itching and Pain After Shaving - Family Medicine

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Itchy and painful armpit?


Hello, doctor: A few days ago, after shaving my armpit hair (using a razor), I have been feeling itchy in my left armpit.
In the past few days, I noticed that not only is it itchy but also painful, and the skin on the upper part of my chest near the armpit has become numb.
It really feels quite uncomfortable...

A-Liang, 10~19 year old female. Ask Date: 2015/12/31

Dr. Xu Peiqi reply Family Medicine


Hello, thank you for your question.
After using an underarm hair trimmer, the underarm hair is merely cut and not pulled out from the root.
Therefore, the cut ends of the hair can irritate the skin during friction, leading to itching and even minor abrasions that may cause pain.
These are common reactions and will typically improve on their own within a few days.
However, if the symptoms are severe or if there are other changes such as localized redness and swelling, it is advisable to seek medical attention for further evaluation to rule out any other underlying conditions beyond simple irritation from the underarm hair.

Reply Date: 2015/12/31

More Info


Underarm itching and pain after shaving can be quite uncomfortable and concerning. It is not uncommon for individuals to experience irritation in the underarm area following hair removal, especially if the method used is shaving. Here’s a detailed explanation of what might be happening and some recommendations for relief.


Possible Causes of Itching and Pain
1. Irritation from Shaving: Shaving can cause irritation to the skin, especially if the skin is sensitive or if the razor is dull. The act of shaving removes hair but can also remove the top layer of skin cells, leading to redness, itching, and discomfort.

2. Ingrown Hairs: After shaving, hairs can sometimes grow back into the skin instead of outward. This can lead to inflammation, redness, and pain in the area, which may also cause itching.

3. Allergic Reaction: If you used any products such as shaving cream, gel, or aftershave, it’s possible that you may be experiencing an allergic reaction to one of the ingredients. This can manifest as itching, redness, and swelling.

4. Folliculitis: This is an inflammation of the hair follicles, often caused by bacteria or fungi. It can occur after shaving and may present as small red bumps, itching, and pain.

5. Nerve Sensitivity: The sensation of numbness or tingling in the area could be related to nerve irritation or sensitivity, which can sometimes occur after shaving due to inflammation or pressure on the nerves.


Recommendations for Relief
1. Avoid Further Irritation: Refrain from shaving the area until the irritation subsides. This will allow your skin to heal and prevent further aggravation.

2. Use Soothing Products: Apply a fragrance-free moisturizer or aloe vera gel to the affected area to soothe the skin. Avoid products with alcohol or strong fragrances, as these can exacerbate irritation.

3. Cold Compress: Applying a cold compress to the area can help reduce inflammation and provide temporary relief from itching and pain.

4. Over-the-Counter Treatments: Consider using over-the-counter hydrocortisone cream to reduce inflammation and itching. Antihistamines may also help if the itching is due to an allergic reaction.

5. Keep the Area Clean: Ensure that the area is clean and dry. Use a gentle, fragrance-free soap to wash the area, and pat it dry instead of rubbing.

6. Consult a Healthcare Provider: If the symptoms persist for more than a few days, worsen, or if you notice signs of infection (such as increased redness, swelling, or pus), it’s important to consult a healthcare provider. They can assess the situation and may prescribe topical or oral medications if necessary.


When to Seek Medical Attention
If you experience severe pain, swelling, or if the numbness spreads or does not resolve, it is crucial to seek medical attention. A healthcare professional can provide a proper diagnosis and treatment plan tailored to your specific condition.

In summary, while underarm itching and pain after shaving can be bothersome, there are several steps you can take to alleviate the discomfort. By avoiding further irritation, using soothing products, and consulting a healthcare provider if necessary, you can manage your symptoms effectively.

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