Dizziness and vomiting after bathing are mostly due to lack of oxygen, insufficient blood supply to the brain, and hypoglycemia, etc. 1, lack of oxygen: the bath will be in a sealed environment, the oxygen content of the environment will gradually become lower with the bath time, when lower than a certain degree is caused by lack of oxygen, and then dizziness, nausea, vomiting, etc.; 2, insufficient blood supply to the brain: the bath temperature is higher, will make Blood flow accelerates, capillary expansion, resulting in insufficient blood supply to the brain, manifested as dizziness, nausea, vomiting, etc.; 3, hypoglycemia: bathing will consume a certain amount of energy, some people may like to take a bath on an empty stomach, after the energy consumption of hypoglycemia, resulting in dizziness, vomiting, etc.; 4, body fluid reduction: in the process of bathing may have sweating, will lead to a small amount of body fluid loss, if the bath time too long, after the bath do not pay attention to replenish water, it will lead to a reduction in effective blood volume, dizziness and vomiting symptoms. When taking a bath, be careful not to take too long, the water temperature is generally 35 to 40 ℃ warm water is appropriate, the temperature is too high easily lead to dizziness, the temperature is too low easy to induce a cold, in addition, you can install a ventilation fan in the bathroom to maintain air circulation, reduce the probability of dizziness and vomiting after bathing.