both of which are common. These scalp disorders show extensive redness and scaling of the scalp. However, I most often see simple, fine and adherent dandruff with a little redness, caused by skin irritation due to external products. It could be a simple case of lice, which is why I systematically look for nits.

I ask my patients how often they wash their hair and what type of shampoo they use. Washing your hair too often with inappropriate shampoo can cause chronic irritation, which is a source of itchiness. This becomes a vicious circle: scratching the scalp provokes inflammation. Drying hair with a hair dryer that is set too high can also harm the scalp. And, don’t underestimate stress, which often triggers itchiness.

There are highly effective treatments for the scalp disorders that I just described. If the source of irritation is external, I explain to the patient that it is very important to use gentle shampoo, thoroughly rinse the hair and not use keratolytic shampoo on a daily basis. There are also cosmetic products that can be applied after washing hair to soothe overly sensitive scalps. Blow drying and styling hair must be done gently. I also explain that it is important to avoid stressful situations as stress can trigger increased sensitivity.