What is the reason for dark patches on underarms that weep on scratching?

Question

Hi,

I have had dark patches under both my underarms for the past almost ten years, but they used to fade away sometimes. Recently it has stayed, and it gets really itchy sometimes, either during the night or when it gets sweaty during the day. When I scratch, it will weep. I have seborrheic dermatitis on the scalp, so I am not sure if it is related. I take blood tests every six months or so, and there is nothing ever wrong aside from high cholesterol. My A1c tests are normal too. I was first diagnosed with psoriasis of the scalp, but then a second opinion said it was seborrheic dermatitis. Sometimes when I scratch my face, the skin peels, it weeps, then it gets red, then reddish-brown, and will disappear after a month or two. Please help.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query and understand your concern.

I am sorry for such discomfort.

I have seen the pictures you have attached (attachments removed to protect the patient's identity).

There is a plaque-like lesion, thickening of the skin with dark skin color compared to the surrounding skin. There is some scaly lesion over it.

After seeing the picture, it could be one of the following-

1. Inverse psoriasis.

2. Chronic eczema of the armpit.

3. Erythrasma.

Usually, inverse psoriasis lesions are red, shiny, and lack scaly lesions, but in the picture, the above features are not present. So, it does not favor inverse psoriasis.

It is more likely chronic eczema. Since the lesion is in the sweating region, there becomes a risk of developing a fungal infection due to the moist environment. That is why it gets itchy also.

I would suggest you visit a local dermatologist for an exact diagnosis. The local examination would give a more clear view. The doctor may do tests to confirm the diagnosis.

As of now, you can apply antifungal cream, but more guided medicine or cream you should take after you visit a dermatologist.

Hope you find my reply helpful.

Thanks.