Nairobi, Feb. 22 -- If you look closely at some men, you will notice a fold or two on their scalp. Often, they are not painful or itchy, just slightly raised ridges that become more noticeable after a fresh haircut or when you run your fingers over. But, are they harmless or an underlying skin problem?

Dr Venkatesh Narasimhan, a clinical and cosmetic dermatologist at the Aga Khan University Hospital, says a skin fold on the scalp is normal.

So, what causes it? "Nothing. It is a fold. Like when you fold your arm, there's a crease that forms in your elbow, right? So, there are folds that can happen on the scalp. They are not an issue."

He adds that men who have insulin resistance and are overweight may notice these folds more because the...