I'm 24 yr old female. got viral fever 5 months back. since then severe hair fall and even now. hair became veryyy thin and lost 75% hair. why is this happening ? what to do?

Possibly Viral: Make your stress two months body even viral infections can cause temporary hair loss. In general if this persists see a dermatologist for a specific diagnosis and treatment

Hair: Various possibilities, but one mechanism could be a thyroid problem. The stress of an infection can encourage and endocrine problem. Check with your provider to get a thyroid test.