What is Seasonal Affective Disorder

　　Every time the seasons change, especially in autumn and winter, some people will inexplicably fall into a low mood, accompanied by symptoms such as insomnia or lethargy, changes in appetite, etc., which will self-relieve after the weather warms up in spring. This kind of mood swings that are strongly related to the seasons is not a simple "bad mood", but may be a manifestation of seasonal affective disorder.

What is Seasonal Affective Disorder

　　Seasonal affective disorder is a mood disorder associated with natural seasonal changes and is a specific type of depression. The core trigger is the change in sunshine duration caused by seasonal changes, which in turn affects the body's biological clock rhythm and neurotransmitter secretion. Reduced sunshine will inhibit the synthesis of serotonin and promote the excessive secretion of melatonin, causing emotional and physiological disorders under the dual effects.

　　Typical symptoms mostly appear in autumn and winter, and are characterized by persistent depression, loss of interest, and energy exhaustion. Some people may experience increased appetite, weight gain, prolonged but poor quality sleep, etc.； A small number of people will have attacks in spring and summer, with the main symptoms being anxiety, irritability, and insomnia, which will gradually ease after autumn.

How to regulate seasonal affective disorder through life intervention

　　1. Strengthen sunlight and light intervention

　　When the sun is mild every day from 9 to 11 a.m., go outdoors to receive 30 to 60 minutes of natural sunlight, and wear warm clothes to avoid catching the cold.； On rainy days or indoors, use full-spectrum light once a day in the morning and evening for 20 minutes each time to help stabilize the biological clock.

　　2. Optimize dietary nutritional structure

　　Eat more foods rich in Omega-3 fatty acids such as deep-sea fish and nuts to help regulate neurotransmitters； Increase B vitamin-rich foods such as whole grains, lean meats, and green leafy vegetables to participate in energy metabolism and mood stability. ； Appropriate supplements of foods high in vitamin D such as egg yolks and milk can make up for the synthesis gap caused by insufficient sunlight.

　　3. Insist on regular and moderate exercise

　　Choose moderate to low-intensity exercise such as brisk walking, yoga, Tai Chi, etc., 3-5 times a week, 30 minutes each time. Exercise can promote the secretion of endorphins, directly improve mood, enhance physical fitness, and reduce physical discomfort caused by seasonal changes.

　　The core of regulating seasonal affective disorder is to adapt to seasonal changes and improve the physiological basis and psychological state through multi-dimensional intervention such as lighting, diet, and exercise. If symptoms persist for more than two weeks and affect your life, you need to seek medical treatment promptly and develop an intervention plan based on professional assessment.