Pain felt on the left side of the body can mean an enlarged spleen, a heart attack, a kidney problem, an ovarian problem or shingles. These diseases are described by Mayo Clinic, the National Heart, Lung and Blood Institute, MedicineNet and MedlinePlus.
The symptoms of an enlarged spleen are rare, according to Mayo Clinic. Pain can radiate from the left side into the left shoulder.
Pain in the left side can also signal a heart attack, notes the National Heart, Lung and Blood Institute. The pain is sometimes felt in the center or on the left side of the chest.
Mittelschmerz is a pain that some women feel when they are ovulating, according to Mayo Clinic. It often alternates between the left and right sides of the lower abdomen. It can be caused when a follicle stretches the ovary or when a follicle ruptures and irritates the women's peritoneum.
If there is something wrong with the kidneys, the patient may feel pain on the left flank or on both flanks, according to MedicineNet. The pain is often concentrated between the patient's lowest rib and the buttocks and may radiate into the groin or into the abdomen. It may be accompanied by blood in the urine, urine that is painful to pass, nausea, and vomiting and fever.
The pain of shingles is also often felt on just one side of the body or the face, according to MedlinePlus. The early signs are shooting or burning pain followed by a rash or long-lasting blisters.