I keep getting a sharp pain in the left side...under my breast-goes from there toward my underarm. Its sharp but not really bad...its bearable...when I sit up straight and take a deep deep breath it seems to stop for a bit.

Dear Anon,

Thanks for reaching out to our community.

Your stomach is located on the left side of your abdomen. Trapped gas can trigger nerve pain in the stomach which is experienced as sharp pain under left breast. So, that might be one cause. Another might be a muscle strain of some sort. If the pain worsens or does not ease up, see your doctor or urgent care facility. There is no way to know for sure what it is without being examined by a doctor. Keep us updated.

Best,
Helena