The following conditions are known to cause sudden hair loss in men, women and children.
2. Ringworm on scalp – Also known as tinea capitis infection, can cause hair loss, that occurs in patches, mostly in children. However, there are many cases of scalp infection that causes loss of hair in both men and women.
3. Drugs – Vast majority of adults taking drugs for treating many diseases complain about sudden hair loss. In this case, hair loss is a side effect that goes away after the medication is stopped.