The hazards of long-term use of mugwort hair washing, mainly for causing allergies, induced inflammation. In daily life, it is not recommended that long-term use of mugwort leaves wash hair, shampooing need to blow dry in time, to avoid cold and cold. 1, allergy: if long-term use of mugwort leaves wash hair, may cause allergic phenomena, such as the appearance of erythema, as well as the size of the millet pimples, blisters, accompanied by itching. Severe cases can be prescribed oral antihistamine treatment, such as loratadine tablets, cetirizine hydrochloride tablets, etc.; 2, infection: if long-term use of mugwort leaves wash hair, may make the scalp protective barrier is damaged, which leads to the outside world of bacteria invasion of the scalp, resulting in infection. Hair washing should regulate the water temperature, with fingers gently rubbing the scalp to achieve a soothing effect, avoid scratching the scalp with nails. If you scratch, it is easier to cause bacteria to invade the scalp, resulting in infection. In addition, after a full meal, just after exercise, a lot of sweat, should be a little rest before washing hair, to avoid dizziness, headache and other adverse conditions.