Yesterday, I took a bath and found that I couldn't help myself up. A red rash is about less than a centimeter in diameter. I applied some iodophor and Arnebia ointment
From the picture symptoms, it may only be local dermatitis and eczema. If it is not painful or itchy, you can also do not use drugs or apply some dermatitis leveling drugs and mupirocin ointment. If you have shikonin ointment at home, you can also use it first to see whether it can subside.
It seems that it may be allergic dermatitis, so this phenomenon may occur. It may be related to exposure to some factors leading to allergy. You can carry out some relevant treatment, such as applying some anti allergy drugs. The diet also needs to be light. Avoid eating something spicy and stimulating. It will have a certain effect and can be improved slowly.
This situation may be caused by the skin's cytochrome deposition or mild dermatitis. You can observe it first. If there is no pain and itching, there should be no big problem. If there is pain and itching and the area increases, it is recommended to go to the hospital for a systematic examination to make a complete diagnosis