If you are hungry, don't take a bath, don't have a haircut, and don't take a bath on an empty stomach or hungry. Because the temperature in the bathroom is high, when you take a bath in warm water, your skin and blood vessels dilate and sweat more, which will emit a lot of heat and consume more energy. Taking a bath on an empty stomach and hunger is prone to hypoglycemia, dizziness, dizziness, sweating, palpitation, hand shaking, and even blood pressure drop and syncope. Don't have a haircut when you are full, because when you have a haircut, you sit upright in your chair and don't move at all, and your abdomen often holds your breath, which will hinder the peristalsis and digestion of the gastrointestinal tract. Therefore, it is more appropriate to have a rest after a meal and before a haircut.