The most common neurological symptom is headache.
Headache is classified mainly into two categories: Primary and secondary.
Primary headache is usually benign and longstanding. Common primary headaches are migraine and tension type headache. They have typical features – Migraine, tends to be pulsating in character, affecting one side of the head, associated with nausea, disabling in severity and it usually lasts between 3 hours and 3 days.
Secondary Headache: This may be caused by problems elsewhere in the head or neck. Some of these are not harmful, such as cervicogenic headache (pain arising from the neck muscles). Medication overuse headache may occur in those using excessive analgesics or other medication for headache.
Serious causes of secondary headache include brain tumors, stroke and brain hemorrhage. Patients having very severe headache, thunderclap headache or sudden change in pattern of long duration headache or having associated symptoms like: vision loss, frequent vomiting, seizures and drowsiness may have serious disease. This type of headache requires brain scan (CT or MRI Scan). It may also require surgery depending on the pathology. Brain tumour biopsy or surgery may be required to know the tissue diagnosis or to relieve the headache and other associated neurological symptoms.