After a little rain, it is advisable to wash your hair. As the air is mixed with a variety of dust, bacteria, and toxic and harmful substances, when the rain drops through the air to the human hair as well as the scalp, these substances can contaminate the hair, stimulate the scalp, etc., may lead to allergic reactions to the scalp, folliculitis, mite growth, easy to induce colds and other symptoms. If there are conditions, hair is wet by light rain, it is best to wash the head thoroughly as soon as possible, keep the scalp clean and dry, in the hair after washing the hair in a timely manner to use the hairdryer to dry the hair. Usually also pay attention to keep the head clean and hygienic, to diligently wash your hair, often combing, etc. can promote blood circulation of the scalp, to maintain the health of the scalp. After a little rain, if scalp disease occurs, you need to go to the hospital in time, active treatment, so as not to miss the condition.