Half-year-old children with thinning hair, consider and genetic factors, cephalic disease, nutritional factors, can be relieved through diet and nutrition, drug intervention and other ways. 1. genetic factors: some children may be affected by genetic factors, resulting in hair thinning, should maintain a balanced diet, avoid shaving the small children, so as not to cause damage to the hair follicle area. 2. ringworm disease: if accompanied by the presence of children have been infected by dermatophyte disease, caused by the phenomenon of ringworm, may also cause hair breakage, thinning, accompanied by scalp itching and flaking, through the use of econazole, ketoconazole and other antifungal drugs treatment. 3. Nutritional factors: half a year old child if there is a lack of calcium and vitamin D in the body, may also affect the growth of hair, can be supplemented with calcium lactate and vitamin D and so on, so as to improve the symptoms. Half-year-old children with thinning hair and other causes (such as children with hypothyroidism), should cooperate with the doctor as soon as possible to clarify the cause, and give targeted treatment, not blindly use drugs.