I keep having sharp stabbing like pains in my right armpit why is this happening?

Nerve problem?: The quality of the pain ("sharp, stabbing") suggests inflammation or irritation of a nerve, muscle, tendon, or one of your ribs. Start by seeing your primary care physician. Ultimately you may need to be be referred to an orthopedic specialist or neurologist.

I don't know: But it could be bad. Why not see your doctor today? Hope this helps!