It will wither when it is cold.

Continuous rain and insufficient illumination can easily lead to human biological rhythm and endocrine disorder, and then affect mood. Its main manifestations are inexplicable general weakness, sudden sadness or irritability, and even severe depression-related symptoms. People's moods and emotions are related to the environment and climate. Long-term rainy weather can easily make people's emotions "go downhill", especially for people who are introverted and not good at communicating with others.

Moreover, the lack of sunshine in rainy days leads to insufficient secretion of some hormones in the body, especially the decrease of dopamine secretion, which leads to insufficient excitement in the brain, which is manifested as depression; If the air humidity is too high in rainy days, the pressure of respiratory system will increase, which will easily cause psychological or physical discomfort.