Underarm Eczema and Folliculitis: Causes and Remedies

Axillary eczema?

Hello, doctor.
This summer, I noticed that due to the heat, I have been sweating under my arms.
There are red patches near the area where my bra sits, which are itchy and painful when scratched, and they also peel.
Eventually, they turn dark and keep recurring.
Could this be eczema, or is it caused by sweating and heat? Will it improve after summer? What methods can help alleviate this? Additionally, after using a razor for hair removal on my legs, I developed small red, swollen bumps that are sometimes itchy.
Could this be folliculitis, or is there another cause? How can I improve this? Should I avoid using a razor in the future?

Ms. Chen, 20~29 year old female. Ask Date: 2017/10/02

Dr. Wu Yuxin reply Dermatology

Without actually seeing the lesion, it is impossible to determine the issue.
If it is very concerning, please seek medical attention as soon as possible.
A proper examination is necessary to understand the problem and to determine the appropriate treatment.

Reply Date: 2017/10/02

More Info

Understanding underarm eczema and folliculitis involves recognizing the symptoms, causes, and potential remedies for these skin conditions. Based on your description, it seems you are experiencing two distinct issues: underarm eczema and possible folliculitis on your legs.

Underarm Eczema
Eczema, also known as atopic dermatitis, is a chronic inflammatory skin condition characterized by red, itchy, and inflamed skin. The symptoms you describe—redness, itching, pain, and peeling skin—are consistent with eczema. The fact that the affected area has become darker over time could indicate post-inflammatory hyperpigmentation, which is common after skin inflammation.

Causes:
1. Heat and Sweat: The summer heat and humidity can exacerbate eczema, especially in areas prone to sweating like the underarms. Sweat can irritate the skin and lead to inflammation.

2. Friction: The friction from clothing, particularly tight-fitting garments, can worsen the condition.

3. Allergens and Irritants: Products such as deodorants, soaps, or laundry detergents may contain irritants that trigger eczema flare-ups.

Management and Remedies:
1. Moisturization: Regularly applying a fragrance-free moisturizer can help maintain skin hydration and reduce irritation.

2. Avoid Irritants: Identify and avoid products that may trigger your eczema. Opt for gentle, hypoallergenic products.

3. Cool Compresses: Applying a cool, damp cloth to the affected area can soothe itching and inflammation.

4. Topical Steroids: Over-the-counter hydrocortisone cream can help reduce inflammation and itching. For more severe cases, a prescription-strength steroid may be necessary.

5. Antihistamines: Oral antihistamines can help alleviate itching, especially at night.

Folliculitis
The red, itchy bumps on your legs after shaving suggest folliculitis, which is the inflammation of hair follicles. This condition can occur due to various factors, including irritation from shaving, bacterial infections, or ingrown hairs.

Causes:
1. Shaving: Using a dull razor or shaving too closely can irritate the skin and lead to folliculitis.

2. Bacterial Infection: Staphylococcus aureus is a common bacterium that can infect hair follicles, especially if there is a break in the skin.

3. Heat and Sweat: Similar to eczema, excessive sweating can contribute to folliculitis, particularly in warm weather.

Management and Remedies:
1. Gentle Shaving Techniques: Use a sharp razor and shave in the direction of hair growth. Consider using shaving cream or gel to reduce friction.

2. Antibacterial Wash: Using a gentle antibacterial soap can help prevent infections.

3. Avoid Tight Clothing: Wearing loose-fitting clothing can reduce friction and irritation in the affected areas.

4. Topical Antibiotics: If you suspect a bacterial infection, topical antibiotics like mupirocin may be beneficial.

5. Avoid Shaving Temporarily: Allow the area to heal before resuming shaving. You might also consider alternative hair removal methods, such as waxing or laser hair removal, which may be less irritating.

Conclusion
In summary, the symptoms you are experiencing in your underarm area are likely related to eczema, exacerbated by heat and sweat, while the bumps on your legs are indicative of folliculitis, possibly due to shaving. Both conditions can be managed with appropriate skincare practices and lifestyle adjustments. If symptoms persist or worsen, it is advisable to consult a dermatologist for a thorough evaluation and tailored treatment plan.

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