Eating chocolate at night usually does not cause insomnia, but it can cause body fat. If overexcited before bedtime, drinking coffee and strong tea before bedtime may cause insomnia. In insomnia, patients can have difficulty falling asleep, or they can show that they wake up easily and early during sleep, or they may have more dreams during sleep, which affects the quality of sleep. Prolonged sleep deprivation may cause ischemia and hypoxia in the brain, and patients may experience headache and dizziness, as well as memory loss, lack of concentration and disordered thinking. If you have insomnia, you have to take oral medication, such as Guvigui, Anxin and Brain Solution, Blood and Brain Granules, and Heart and Mind Tablets. When the effect is not good, you can also take some oral sedative drugs, such as eszopiclone and alprazolam. Physical therapy can also be used, such as physical exercise and outdoor sports. Drinking a glass of hot milk before going to bed or soaking your feet in hot water before going to bed or doing some aerobic exercises before going to bed may help improve your sleep.