Neuralgia is caused by irritation or nerve damage from systematic disease, inflammation, infection and compression or physical irritation of a nerve. Neuralgia can result from tooth decay, poor diet, eyes strain, nose infection, exposure to damp and cold. A typical migraine attack produces throbbing pain on the side of the head often accompanied by nausea, sometimes with vomiting. Visual symptoms are common and facial tingling and numbness may occur. Pain sometimes spreads to affect the entire head and is worsened by physical sensitivity, extreme sensitivity to light and noise are common. Patients may feel cold and look pale. Transformed migraines, such headaches resembles tension type headaches.