Pain on the left side of the body can have many different causes. Some are minor, while others need urgent medical attention. The significance depends on where the pain is, how severe it is, how long it lasts, and whether you have other symptoms.
Here are some common possibilities:
- Left chest: Muscle strain, acid reflux, or anxiety can cause pain, but it can also be a sign of a heart attack, especially if the pain is crushing or pressure-like and spreads to the left arm, jaw, neck, or back.
- Left shoulder or arm: Muscle or tendon injuries, pinched nerves in the neck, or heart-related problems.
- Left upper abdomen: Gas, indigestion, stomach ulcers, problems with the spleen, or inflammation of the pancreas.
- Left lower abdomen: Constipation, diverticulitis, kidney stones, urinary tract infection, or ovarian conditions (in people with ovaries).
- Left back or flank: Kidney stones, kidney infection, muscle strain, or spinal problems.
- Left leg: Muscle injury, sciatica, or, less commonly, a blood clot in a deep vein (deep vein thrombosis), especially if the leg is swollen, warm, and painful.
Seek emergency medical care immediately if the pain:
- Is severe chest pain or pressure.
- Spreads to your left arm, jaw, neck, or back.
- Is accompanied by shortness of breath, sweating, nausea, fainting, or confusion.
- Occurs suddenly with weakness or numbness on one side of the body, trouble speaking, or vision changes.
- Follows a serious injury or is associated with heavy bleeding.
Arrange prompt medical evaluation if:
- The pain is severe, persistent, or keeps coming back.
- You have fever, vomiting, blood in your urine or stool, or unexplained weight loss.
- The pain is associated with swelling, redness, or difficulty moving a limb.
If the pain is mild and seems related to a muscle strain, rest, gentle stretching, staying hydrated, and over-the-counter pain relief (if it’s safe for you to take) may help. However, if it doesn’t improve within a few days or gets worse, you should see a healthcare professional.
Can you tell me:
- Exactly where on the left side you feel the pain (chest, arm, shoulder, abdomen, back, leg, etc.)?
- How long you’ve had it?
- Is it sharp, dull, burning, or cramping?
- Do you have any other symptoms such as fever, shortness of breath, nausea, numbness, weakness, or swelling?
