Hi I when i use socks i get a black mark which is very very itchy on the top of my foot, please help what can i use to stop this, it turns red after a which, it is so cold i cannot use socks. please help
The rash could be due to contact dermatitis, that is exposure to an irritant like a chemical or metal or anything you are allergic to, it can cause rash. Looks like the material that the socks is made of is not agreeable to you. Substitute cotton ones and see. But to exactly pinpoint the pathology you will need to consult your primary care physician who will examine you and may ask for blood tests. If the need arises he may refer you to a dermatologist.