Question: what is the difference between diffuse alopecia areata and telogen effluvium?
Answer: Sudden loss of hair is usually telogen effluvium, but can also be diffuse alopecia areata. In telogen effluvium, once the precipitating cause is removed, the hair will regrow. ... Hair loss on the scalp can be further classified as focal or diffuse. This distinction is the first step in diagnosis.