Talk to Dermatologist on Hair Issues

Salam i am a 22 year old male and I have been having a problem of hair thinning for last 2 years i am an athlete and have been active my whole life i have been weight lifting for last 3 years and currently i am in the best shape of my life physically but this hair problem is affecting my confidence I don't smoking or anything having taken any form of steroids if that comes to anyone's mind when you see the word weight lifting I just wana know the root cause of my hair fall and hair thinning And solution thank you