Q: Why is my hair falling out so much after recovering from an illness? A: This is very common and is called Telogen Effluvium (temporary shedding). When your body goes through high stress—like a severe fever, infection, or major surgery—it temporarily stops spending energy on growing hair so it can focus on healing you. Around 2 to 3 months after the illness, you will suddenly see a lot of hair fall. The good news is that with the right clinical care and vitamins, this type of hair fall can be fully reversed.