Hello arif ;
welcome to HealthcareMagic
Hairloss can be due to your disease ;drug induced;due to mental and physical stress
and commonly due to a condition called telogen effluvium
which can happen due to stress and weakening disease ;also in males it can be androgenic alopecia
.So to ascertain the cause you can consult a Dermatologist
and he will guide you regarding the diagnosis and treatment to restore your hairs and as a home remedy you can daily apply castor oil to your scalp it should help you .