n. The verb in a verb phrase that expresses the action, state, or relation and is not an auxiliary verb. In the sentence, The bird has flown, fly is the main verb.
Types of Headache. This medical symptom information shows the various types of Headache, and other related symptoms or conditions, including their causes and diagnosis. Throbbing headache. Persistent headache. Severe headache. Migraine. Aura. Forehead pain.
Secondary headache. The aforementioned are the most common forms of headache, known as primary headaches. Secondary headaches are a symptom of another condition, for example, if you have influenza, one of the symptoms will often be a headache; if your sinuses are blocked, this can result in a headache etc.