Spring is here and everything is coming back. Take off your hat and let your hair take a deep breath, too. Then, the problem comes, hair strands, shiny, itchy scalp, gently scratched, found some small particles on the scalp bumps, slightly painful, hard to scratch will appear a little white pus and a small amount of red blood, and then pull the hair, can also fall off a few hair to. At this point, one has to realize that there is a problem with the scalp. This is the common seborrheic dermatitis combined with seborrheic alopecia. How to prevent and treat seborrheic dermatitis and seborrheic alopecia? First of all, the diet should be light, should often eat foods rich in b vitamins and protein, such as eggs, milk, lean pork, beef, chicken, duck, peanuts, soybeans, soy products and fresh vegetables, fruits, etc.. Avoid high-calorie or stimulating foods, such as fried foods, chili peppers, cigarettes, alcohol, coffee, and beef containing isomorphic proteins, etc. Eat less sugar and animal fats. Secondly, hair should be combed often, or head massage, the purpose is to stimulate the head meridians, promote blood circulation, shampoo to avoid using alkaline strong shampoo, the best choice for the scalp and hair without stimulation of neutral or weak acid shampoo. If your hair is oily, you can wash your hair once a day. Washing your hair in the morning is better than washing your hair at night because the secretion of head oil is relatively high at night. If the hair is not very oily, you can wash your hair once every two or three days. The water temperature of shampoo should not be too hot, after shampooing, apply selenium disulfide lotion to the root of the hair, keep it for 5-10 minutes, and then rinse it off with water to effectively inhibit the secretion of head oil. Do not perm your hair as much as possible. Once again, life and rest should be regular, early to bed and early to rise, sleep enough, reduce psychological stress, which can effectively reduce the secretion of sebaceous glands. Finally, if necessary, you can combine medication, such as oral vitamin B6 tablets, spironolactone tablets, cimetidine, etc. After the above treatment, if the symptoms are still not relieved, it is recommended to go to the hospital to avoid delaying the diagnosis and treatment.