Lupus is a systemic autoimmune disease that causes chronic inflammation that can affect any part of the body, including the skin and therefore the scalp. About one out of every 2,000 people is affected by lupus, with a higher prevalence in women (90% of cases). Lupus symptoms are very numerous, the disease may be mild or more severe; they are also highly variable in time, may appear and disappear over a period called remission. Hair loss (or alopecia) caused by lupus is usually diffuse, that is to say, localized where there are lesions, sometimes more important, but still reversible, but regrowth of hair is often long to appear. When it comes to the form of lupus socalled "discoid" or with reddish patches with crusted, it is much less certain that the hair will grow back because the hair follicle is sometimes reached.