Symptoms of insomnia may occur after the New Crown vaccine, but are usually rare. Whether or not you will experience insomnia is not certain, as everyone’s constitution is different, and so are the symptoms that occur. Some people may experience palpitations, excessive dreaming, insomnia, and fatigue, while others may experience dizziness and headache, and if they are particularly severe, they need to go to the hospital in time for treatment. After the new crown vaccine is recommended to drink a lot of water, to maintain a happy mood, to avoid excessive mental stress, and do not eat seafood and other allergy-prone food.