A headache and dizziness with a cold and a dry nose that makes you want to vomit may be related to a cold viral infection or may be caused by other illnesses. Colds are a common upper respiratory tract infection, with viral infections being the most common. Dizziness, headache and vomiting may be related to the inflammatory reaction caused by the virus acting on the cerebral blood vessels. A dry nose is caused by a virus that causes the capillaries in the nasal mucosa to constrict, leading to symptoms of a dry, burning sensation inside the nose. Nausea may be associated with congestion and edema of the gastrointestinal mucosa caused by the virus. Besides, headache, dizziness, dry nose and nausea may not be entirely related to colds and may be caused by other diseases such as sinusitis. If the symptoms are not relieved or aggravated, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and then carry out targeted treatment, do not blindly self-medication to avoid delaying the condition.