1. When a  person gets too cold, blood vessels in the skin narrow. This helps to trap  heat inside the body.

2. Doctors  do not know the cause. However, as with some other skin disorders, they  suspect that the body’s immune system is involved.

3. Some  skin disorders do not cause any physical pain. But, they can cause emotional  pain by how they affect the appearance of the skin.

4. For  some people, the white spots of vitiligo appear only in one or two areas.  Others find pigment loss on just one side of their bodies.

5. People  with more serious acne may be given antibiotics to take by mouth. Or they  might use a combination of pills and creams.

当一个人太冷，皮肤中的血管变窄。这有助于把热量保留在体内。

医生不知道原因。然而，如同其他一些皮肤疾病一样，医生怀疑原因与人体的免疫系统有关。

一些皮肤病不会引起任何身体上的疼痛。但是，皮肤病可以通过影响皮肤的外观造成患者情绪上的痛苦。

有些人白癜风的白斑仅出现在一个或两个部位。另一些人发现自己身体的一侧有色素损失。

患痤疮更严重的人可给予口服抗生素，或可用药物和乳霜结合治疗。