Tfirst likely answer would be a strained intercostal muscle or a damaged rib. Another possilbity is referred pain from a back injury. An inflamed lymph node could also do this as could inflamation of...
It could either be your gallbladder or liver. Your gallbladder is just underneath your liver. If you find that you were eating fatty foods and then have the "sudden sharp pain under right breast",...
That could be a migraine headache or a muscle tension headache. If it happens often you should discuss it with your doctor. You could try an over the counter migraine remedy to see if it provides...
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