I keep getting this sharp pain under my left arm, What could it be?

Question

Its sounds really weird but i keep getting this sharp pain in my left armpit and it really hurts.. im starting to get worried now. What do you think it is?

Answer 1

Pain can be referred from places other than the head. This deals with headaches but the principle works for all kinds of pain.
Muscles get knots called trigger points. These make the muscles tight causing them to press on nerves and other thing.
#1 The first thing is to take a couple swigs of molasses or eat a couple of bananas. They contain magnisium and potassium both of which muscles need.
#2 WATER she should be drinking 1/2 gallon minimum. The head of neurology at UCDavis likens a body running low on water to a car running low on oil (the engine can seize).
Get a good (deep tissue) massage (to loosen the trigger points) on the back, shoulders and neck. Make sure to press up at the base of the skull where it meets the spine.
You rub or lightly scratch everywhere on your head. You will hit spots that are tender these are trigger points. The idea is to rub across them 6-12 times per session up to six times per day until they go away.
For more information on trigger points read The Trigger Point Therapy Workbook by Davies.

Answer 2

my mom had same pain 3 years back, it was from her neck, its better to see a bones doctor.
wish you to be in good health always