Try to explain from a biological point of view why sudden changes in the weather can lead to acne on the face.

Haha, my friend, why must we look at it from a biological point of view? I can answer your question satisfactorily from the perspective of weather and medicine:

When the weather changes, the temperature changes obviously \ the magnetic force changes obviously in the atmosphere \ the air pressure changes. At this time, the human body needs to adjust to these changes. If it doesn't adapt or adapts slowly, there will be some problems in the body, such as joint pain of many people (some people say it can be used to predict), cold, and acne caused by your secretion disorder.

Suggestion: Take more exercise to improve your body's adaptability to the weather. In addition, the weather under the influence of cold air, especially dry and cold weather, is easy to get angry, so eat more light things.