What's wrong with the black sides below?

The black color on the two sides below may be related to improper dressing, or it may be caused by local eczema. Symptomatic treatment is needed to improve it, and local hygiene work needs to be done well.

1. Improper dressing: If you often wear tight clothes, it may cause local rubbing and irritation, which is likely to cause local pigmentation and lead to blackening on both sides. This is generally a normal phenomenon and there is no need to worry too much. At the same time, you need to correct bad habits and try to wear loose, comfortable, breathable and pure cotton clothes to reduce local friction irritation;

2. Eczema: Eczema is a chronic inflammatory itchy disease. If the local environment is usually humid, sweating can easily cause local bacteria to breed, leading to local symptoms of eczema. It may also be related to genetic factors or chronic infectious lesions, which may cause severe itching symptoms on the local skin, accompanied by local papules or papulovesicles, and may be accompanied by local inflammation. Under severe stimulation, it may also cause local blackening. Generally, zinc oxide paste can be applied locally, or boric acid solution can be used for wet compresses to improve the condition. Hydrocortisone cream or dexamethasone cream can also be applied for treatment, which usually improves the symptoms. Try to avoid scratching the local skin.