Pain on the left side of the body can mean many different things. The location—chest, upper abdomen, lower abdomen, back, hip, or arm—makes a big difference.
Possible causes
❤️ Left chest/upper body
- Muscle strain or inflammation
- Acid reflux
- Lung problems
- Heart problems, including heart attack or angina
Heart-related pain can spread into the left or right arm, shoulder, neck, jaw, back, or abdomen and may occur with sweating, nausea, or shortness of breath. (nhs.uk)
🩺 Left upper abdomen / under the ribs
- Gas or indigestion
- Stomach inflammation or ulcer
- Pancreatic problems
- Problems involving the spleen
- Occasionally pain referred from the chest
The spleen is located beneath the left ribs. Severe left-upper-abdominal pain after an injury, particularly with dizziness or left shoulder pain, can indicate a ruptured spleen and requires emergency care. (Mayo Clinic)
⬇️ Left lower abdomen
- Constipation or gas
- Irritable bowel syndrome
- Urinary problems
- Diverticulitis, which commonly causes left-lower-abdominal pain and may come with fever, nausea, constipation, or diarrhea. (Mayo Clinic)
🫘 Left side/back
Kidney stones or a kidney infection can cause one-sided pain around the flank or back. Fever, painful urination, vomiting, or blood in the urine make a kidney problem more concerning. (Mayo Clinic)
🚨 Don’t ignore these symptoms
Seek emergency medical attention for sudden or severe left-sided pain accompanied by chest pressure, difficulty breathing, fainting/dizziness, heavy sweating, confusion, or pain spreading to the arm, jaw, neck or back. These can be signs of a heart attack or another emergency. (nhs.uk)
Likewise, severe abdominal pain after an injury—especially under the left ribs with dizziness or weakness—needs urgent evaluation because of the possibility of internal bleeding. (Mayo Clinic)
If you tell me exactly where the pain is (left chest, left upper abdomen, left lower abdomen, waist/back, arm, or leg), your age, how long you’ve had it, and whether you have fever, vomiting, breathing trouble, or urinary symptoms, I can narrow down the more likely causes.
