In those cases, the side the symptoms appear on may be more or less random. You may notice these on the left side and not the right, but they’re not inherently exclusive to that half.

Left atrial enlargement (LAE) is when the left side of the heart enlarges or swells, leading to breathlessness, fatigue, and other symptoms. It often affects people with high blood pressure and ...

Headache on the left side may cause generalized aching or pain in a specific place, such as behind the left eye. It may feel throbbing, sharp, or piercing. Most people will experience a headache ...

If you have chest pain on the left side, your first thought may be that you’re having a heart attack. While chest pain can be a symptom of heart problems, that’s not always the case.

The most common cause of low back pain on the left side is a muscle strain. Other causes of lower left back pain include a kidney infection, herniated disc, and pregnancy. To treat lower left back ...