Left Arm Pain: Heart Attack Signs and Other Causes

Left arm pain is usually caused by a muscle, tendon, joint or trapped nerve. But it can also be a sign of a heart attack. Call 112 at once if the pain comes with chest pain or pressure, breathlessness, sweating, nausea or feeling faint. Sudden, severe arm pain on its own needs a doctor today.

Dr. Pedro Yelamo Vera is a GP licensed in Spain (Colegiado No. 484814280).

For a medical emergency, call 112 or go to the nearest local emergency department. Do not wait for a video consultation or an online reply.

When is left arm pain a heart attack?

Mayo Clinic notes that arm pain, especially pain that spreads into the left arm, can be a sign of a heart attack. The NHS describes heart attack pain as tight, heavy or squeezing. It often starts in the chest and spreads to the arms, neck, jaw or back. Other signs are:

• Shortness of breath.
• Sweating, often a cold sweat.
• Feeling sick or being sick.
• Feeling light-headed or faint.
• A feeling like bad indigestion.
• Pale, grey or blue skin or lips.

The side matters less than people think. The CDC lists pain in one or both arms or shoulders. A review in JAMA found that chest pain spreading to one or both shoulders or arms, or brought on by effort, makes a heart cause more likely. Pain that is sharp and stabbing, changes with position or hurts when you press on it makes it less likely. No single feature rules a heart attack out, though, so tests are still needed if there is any doubt.

What should I do if I think it is my heart?

• Call 112. It is the emergency number across Spain and the EU, like 999 in the UK or 911 in the US.
• Stop and sit down. Do not drive yourself to hospital.
• Follow the operator's advice. They may tell you to chew an aspirin if you are not allergic to it. Do not delay the call to look for one.
• If you have a GTN spray for angina, use it as your doctor told you.
• Keep a list of your medicines with you.

Speed saves heart muscle. MedlinePlus explains that the risk is highest in the first hours. If the person collapses and is not breathing normally, trained bystanders can start CPR and use a defibrillator if there is one.

Do women and people with diabetes have different symptoms?

Often, yes. Mayo Clinic says women, older adults and people with diabetes may have symptoms that seem unrelated to the heart, such as nausea or a brief pain in the neck or back. MedlinePlus adds that they may have little or no chest pain and instead feel short of breath, tired or weak. The CDC says women are more likely to have unusual tiredness, nausea or vomiting.

So do not wait for crushing chest pain. Arm, jaw, neck or back discomfort with breathlessness, sweating, nausea or sudden, unusual tiredness also needs 112, above all if you have diabetes, high blood pressure, high cholesterol, smoke or have heart disease in the family.

What if the pain comes on with effort and goes with rest?

That pattern can be angina: chest pain caused by poor blood flow to the heart. The NHS describes a tight or dull ache in the chest, arms, neck or jaw. It is set off by exercise, stress, cold or a big meal. It usually lasts less than 10 minutes and stops with rest.

• First time, and it has stopped: see a doctor today. A GP who suspects angina usually refers you to a heart specialist.
• Known angina that is getting worse, happens more often, lasts longer or comes on at rest, but each attack settles: see a doctor today.
• Pain that does not stop after a few minutes of rest or after your angina medicine, or comes with sweating, sickness, light-headedness or breathlessness: call 112.

What else causes left arm pain?

Most left arm pain has nothing to do with the heart. Mayo Clinic and the NHS list common causes:

• Shoulder problems: rotator cuff injury, tendonitis, bursitis, impingement or frozen shoulder. Pain is often worse when you use the arm.
• A trapped nerve in the neck: pain, tingling or numbness that runs down the arm, sometimes into the fingers.
• Elbow and wrist problems: tennis elbow, carpal tunnel syndrome or a trapped ulnar nerve.
• Strains, sprains and fractures after a fall, sport or heavy lifting.
• Arthritis in the shoulder, elbow or neck.
• Shingles, a viral infection of a nerve.
• Cellulitis, a skin infection.
• A blood clot in an arm vein: the arm is swollen, painful and red or darker. See a doctor today.

Clues that point to a muscle or joint: the pain started after a clear strain, you can find a sore spot, and it changes with certain movements. These clues help, but they do not exclude the heart if you also have the warning signs above.

Could it be a stroke?

A stroke usually causes weakness or numbness rather than pain. The NHS FAST test checks for a drooping face, an arm you cannot lift and hold up, and slurred speech. Sudden weakness or numbness in one arm, or down one side of the body, needs 112 at once. Call even if it goes away after a few minutes.

What helps a strained arm or shoulder at home?

For a simple strain, with no warning signs:

• Keep the arm gently moving. The NHS advises against resting it completely.
• Use a cold pack or heat for up to 20 minutes at a time.
• Avoid the movements that make it worse, heavy lifting and the gym until it settles.
• A pharmacist can advise on a painkiller such as paracetamol or ibuprofen, or a gel, if they suit you.

The NHS says shoulder pain often improves in about two weeks, though full recovery can take months.

When should I see a doctor about arm pain?

Today, without waiting, if:

• Pain comes on with effort and eases with rest.
• The pain is sudden or very bad, or followed a fall or injury.
• You cannot move your arm, or it looks out of shape.
• The arm is badly swollen, red, hot or cold.
• Pins and needles or numbness do not go away.
• You have a fever or feel unwell.

Soon if the pain is getting worse or has not improved after two weeks of home care.

In Spain, an injury that may need an X-ray, or a possible clot, is best seen in person at a centro de salud or hospital urgencias. On a Spanish report you may see dolor en el brazo izquierdo, infarto (heart attack) or angina de pecho.

Talking it through with a doctor by video

Dr. Yelamo is a GP licensed in Spain. He sees adults, children and pregnant patients by video, every day from 07:30 to 20:30 (Spain time). In the visit he will:

• Ask first about any heart warning signs. If your pain could be your heart, he will tell you to call 112.
• Ask how and when the pain started, and what makes it better or worse.
• Watch you move your neck, shoulder and arm on camera.
• Agree a plan, and tell you if you need an X-ray, a scan or an in-person exam.

He does not promise any test or prescription before the visit. Where clinically appropriate, following a genuine evaluation. Treatment and prescriptions are issued solely at the doctor's discretion based on evidence-based clinical guidelines.

A prescription is never guaranteed: it is issued only where clinically appropriate after a genuine evaluation, as a private electronic prescription under Spanish law. This service is for urgent, non-emergency care. In an emergency, call 112.

See how the Urgent Care video visit works. It lasts 15 minutes and costs €50.

This guide is general information. It does not replace a consultation with your doctor.

Frequently asked questions

Sources

• NHS: Heart attack symptoms
• NHS: Angina
• Mayo Clinic: Arm pain
• Mayo Clinic: Heart attack
• CDC: About heart attack symptoms

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