I saw the photos you took, and from the photos, your skin should be allergic. This kind of skin is stimulated by the outside world, such as bacteria, which can be moisture or skin rupture infection!

If it is moisture, go to the drugstore to buy some ointment for allergic dermatitis. It should be in the primary stage, not so serious.

If you want a radical cure, you'd better go to the Chinese pharmacy to buy some medicine for external application and internal use. Personally, I suggest you see a doctor early!

They see this symptom more often, and you can analyze it through the skin. He was infected by a specific medical method.

I hope my answer can help you.