The causes of hair fall could be due to stress, fungal infections, alopecia aereata, hormonal imbalance
(overproduction of dihydrotestosterone and thyroid hormones
irregularities),malnutrition, telogen effluvium and sebum plugs on skin. Telogen effluvium is nonscarring alopecia characterized by diffuse hair shedding, often with an acute onset. There is a chronic form also which persists for a longer duration and starts with insidious onset.