Headache on the left side may cause generalized ... severe pain on one side of the head, often around the eye. The pain can be very severe, and it may feel sharp, burning, or piercing.

Neck pain on the left side usually results from a benign cause, like muscle strain from sleeping in an awkward position. Sometimes, a more serious cause may be a tumor or rheumatoid arthritis.

Chronic pain can result from nervous-system overload that creates physical symptoms in response to repressed emotions, therapist Nicole Sachs says.

Pericarditis is inflammation of the thin sac that surrounds the heart. It can cause a sharp pain on the left side or middle of your chest. You might also have pain in one or both shoulders.

Trauma or injury to the left side of the body can cause an enlarged spleen to rupture, leading to severe, sharp pain that ...