I loose my hair on my head how can i do to overcome it and regrow them?

Depends on cause...: One's primary care doctor can check for medical causes. If none are found, then one can see a dermatologist, especially one specializing in hair restoration (some treatments: minoxidil, etc...). Medical causes may include: hormonal problems (low thyroid), seborrhea, alopecia areata, stressful illness, etc... Other causes: genetic male or female pattern baldness, telogen effluvium, etc...