For 4 days i've been getting what feels like intense crippling sharp nerve spasms in my left side of my head. it's getting worse.

Neuralgia: You may be right in your description of symptoms as they are strongly suggestive of neuralgia which is an irritable/irritated superficial nerve in the scalp often of unknown causeGenerally this Is more of a nuisance rather than anything serious and is treated with Tylenol (acetaminophen) or,if you can take them,nsaids like ibuprofen for a few days. See your physician or a neurologist if symptoms persist or worsen

Cramps: Muscle cramps are very common and 'cramp' is usually taken to mean 'a spasmodic, painful, involuntary contraction of skeletal muscle'. This transient, involuntary episode of pain is usually brief (<10 minutes). The lower limbs are almost invariably involved. However, no single accepted definition of muscle cramp exists and many classifications of muscular cramps have been attempted. http://patient.info/doctor/muscle-cramps

One possibility: Trigeminal Neuralgia; sharp, electric type pains, or spasms usually on one side of face lasting seconds to minutes, recurring repeatedly for some days or weeks then settling for some months. Thought to be caused by compression of the trigeminal nerve by a blood vessel it is most common in over 50s. Diagnosis with Dr. At your age TMJ dysfunction / migraine / cluster headache are also possibilities.

Occipital neuralgia : There are a number of causes for pain in the head, and it is best to see your GP if they are persistent. One possibility is occipital neuralgia, which causes painful intermittent lightening type pain arising from the back of the head, try this link http://www.hopkinsmedicine.org/healthlibrary/conditions/adult/nervous_system_disorders/Occipital_Neuralgia_22,OccipitalNeuralgia/

Head pains: The causes may vary from an eye problem, nerve problem (like trigeminal neuralgia), jaw problems, infections, and cluster headaches to name a few. It is always best to start with simple analgesia and see your doctor if symptoms persist.

See a doctor: This might be a simple tension headache or migraines or nerve pain related to posture/ muscle spasms. However it could be something more sinister such as temporal arteritis or an intracranial tumour. You need to see a doctor as soon as possible and more so if you have any associated blurred vision or other worrying symptoms such as vomiting, neck stiffness, dizziness, fainting

Neuralgia??: May be a possibility or headache disorder. Very rarely low calcium can cause facial spasms. A doctor assessment should help sort it out and work out the best way forward in terms of treatment