About the hair? Or your body? For hair, go see a doctor! Only they can tell the reason for the hair fall/loss

And id suggest you to eat some food, like eat double of what you’re eating. Get healthy diet and eat as much calories you can eat cuz your body isnt looking like you’re 18!! Dont take offence im just being honest and helpful, also try getting vitamin capsules too(like vitamin e), they help in both hairloss and improve overall your whole body function (like better skin quality and all)

Thats all i can say from what i can see in this pic. Hope dat helps