The causes of headache and nausea are more common, and the common ones are primary headache disorders, such as tension headache, which occurs mostly in young and middle-aged people. The exact cause is not clear, and may be related to mental tension and stress. It usually manifests as distension, soreness, and dull pain in the top of the head, frontotemporal region, and back of the head bilaterally, while it can appear to be aggravated in bursts or may feel like it is about to explode, and most of the pain is a tightening sensation, which can be accompanied by nausea in severe cases and will not be accompanied by vomiting. Patients with migraine can also have recurrent side throbbing headaches, which usually last from a few hours to 72 hours. Patients with organic brain lesions can also have headache and nausea, and should have a cranial MRI to make a clear diagnosis.