Discomfort in the back of the head can be caused by a variety of factors, and discomfort in the back of the head for a short period of time may be a subhealthy state caused by irregularities in life. Mental tension, emotional anxiety, long-term exertion, lack of sleep, etc., can have head discomfort, the back of the head is also drowsy. There are also diseases that can cause: 1, hypertension, hyperlipidemia patients once a long time back of the head discomfort, need to be alert to the occurrence of cardiovascular disease. 2, cervical spondylosis and vertebrobasilar artery ischemia can cause insufficient blood supply to the brain, very easy to appear back of the head discomfort, and there are back of the neck muscle tension, feeling stiff, dizziness, vertigo and other symptoms. 3, obese people often sleep at night Snoring, and even apnea phenomenon, and cause sleep is not solid, always tossing and turning, low sleep quality and lead to daytime dizziness, brain swelling, the back of the head heavy, poor spirit, etc..