Insomnia during weight loss is related to mental tension, adverse drug reactions, excessive exercise or low blood sugar. 1. Mental tension: If the pressure to lose weight is relatively large, it will cause mental tension and insomnia, and it will be better by adjusting the mood. 2. Adverse drug reactions: If you take diet pills during weight loss, it may affect the human endocrine system and stimulate the cerebral cortex to insomnia, which will be relieved after stopping the drug. 3. Exercise too much: If the amount of exercise during weight loss or exercise before bedtime, will also cause muscle fatigue and soreness caused by poor sleep, by reducing the amount of exercise, avoid strenuous exercise 2 to 3 hours before bedtime can be relieved in general. 4. Low blood sugar: If the movement more physical consumption without timely food may cause hypoglycemia, insomnia, supplemental sugar will be better. So weight loss should be scientific weight loss, under the guidance of a professional doctor, scientific eating, scientific exercise. If insomnia is difficult to relieve for a long time, you should consult a doctor in time.