I am 22 yr old. My TSH level is 4.53 and having medicine. I GT loss large volume of hair daily. Can I prevent this? Hair will grow back?

Hypothyroidism. Among many others, hair loss can be one symptom of hypothyroidism. With a TSH of 4.53 you may have this condition, and you're on thyroxine. Your hair may grow back as your thyroid problem is corrected, but it may take several months.
More needed. You need more thyroid hormone to make TSH 1. Hair will eventually come if there no other reasons.