Common causes of pain on the left side of the body include infection and injury to muscles, nerves, or internal organs, such as the heart, spleen, left lung or kidney, pancreas, and more. It is best ...

Allergies, infections, and illnesses might cause just one side of your throat to hurt. If the pain is severe or accompanied by other symptoms, it may be an early indicator of a more serious condition.

People often associate endometriosis with extreme discomfort in the pelvis and abdomen. Some people with this condition may experience endometriosis pain on the right side only. In a person with ...