Neuralgia
Trigeminal neuralgia (TN) is a type of chronic pain that affects your face. It causes extreme, sudden burning or shock-like pain. It usually affects one side of the face. Any vibration on your face, even from talking, can set it off. The condition may come and go, disappearing for days or even months. But the longer you have it, the less often it goes away.
TN usually affects people over 50, especially women. The cause is probably a blood vessel pressing on the trigeminal nerve, one of the largest nerves in the head. Tumors and multiple sclerosis can also cause TN, but in some cases the cause is unknown.
There is no specific test for TN. It can be hard to diagnose, since many other conditions can cause facial pain. Treatment options include medicines, surgery, and complementary techniques.
NIH: National Institute of Neurological Disorders and Stroke
Physician's Therapeutics Memoranda on Neuralgia
For immediate relief, prescribe acetanilid, phenacetin or anti pyrin usually conjoined with caffeine and potassium or sodium bro mide, sometimes gelsemium or cannabis indica; locally, liniments of aconite or chloroform; menthol, chloride of methyl spray; applica tions of electricity; hypodermatic injections of morphine and atropine (only when nothing else will serve). .In the general treatment, strychnine, arsenic and iron are the most generally useful remedies, but attention must always be given to the general condition of the patient, and laxatives, antimalarial remedies or nerve tonics, like phosphorus, prescribed accordingly.1
General treatment for neuralgia. Hypodermatic iniections of atropine in heroic doses (1-20 grain) is highly recommended by some to cut short the attack. Others advise acupuncture or local massage or the ether spray, applied daily, or the hypodermatic use of morphine or of chloroform. In any case the hot water bottle and liniments of chloroform, aconite, methyl salicylate and menthol are remedies of value.1