Shoulder Blade Pain: Causes, Left vs Right and Relief

Quick answer

Usually muscular or from the neck; sudden pain with chest symptoms is an emergency

Most shoulder blade pain is caused by strained or overloaded muscles (rhomboids, trapezius, levator scapulae), irritation of the neck joints or a nerve in the neck, rib joints, or long periods of sitting and screen work. It typically aches or burns, may be stabbing on certain movements and is often tender to press. Right-sided pain can occasionally come from the gallbladder or liver, and left-sided pain from the heart, especially in women, in whom heart attacks more often cause back, jaw or shoulder pain. Gentle movement, heat, posture breaks and progressive exercises help most mechanical pain.

Important. Call emergency services for shoulder blade or upper back pain with chest pressure, breathlessness, sweating, nausea, pain spreading to the jaw or arm, sudden tearing pain, coughing blood or fainting. See a doctor urgently for pain with fever, unexplained weight loss, a history of cancer, a recent fall, or a blistering rash.

Where the pain comes from

The shoulder blade is a flat triangular bone that glides over the back of the ribcage. Around 17 muscles attach to it, including the rhomboids between the blade and the spine, the trapezius over the top, the levator scapulae up to the neck, and the rotator cuff. Behind it lie the ribs and the joints where they meet the spine. Pain felt “under” the shoulder blade can come from any of these structures, from the neck (which refers pain downward), or from organs in the chest and upper abdomen that share nerve pathways.

Common causes

Muscle strain or overload: lifting, sport, carrying a bag on one side or a sudden twist. Read more in our guide to a pulled muscle near the shoulder blade.
Posture and desk work: hours with the head forward and shoulders rounded load the muscles between the blades.
Neck problems: irritated facet joints or a pinched nerve in the neck often cause pain along the inner edge of the blade, sometimes with arm tingling. See neck muscle strain.
Rib joint irritation: sharp, catching pain with deep breaths or turning.
Shoulder problems: rotator cuff and frozen shoulder can ache behind the shoulder.
Sleeping position and an unsuitable pillow.
Stress: tension in the upper back muscles.
Shingles: burning pain on one side that is followed by a rash a few days later.

Left versus right shoulder blade pain

Left side: most left-sided pain is muscular, but the heart can refer pain to the left shoulder blade, arm, neck or jaw. Women, people with diabetes and older adults more often have “atypical” heart symptoms such as upper back pain, fatigue, nausea or breathlessness rather than crushing chest pain. Stabbing pain under the left blade that is clearly linked to a movement and reproduced by pressing is usually musculoskeletal; pain that comes with exertion or with breathlessness is not.

Right side: again usually muscular, but gallstones can cause pain under the right shoulder blade, typically after fatty meals, together with upper abdominal pain, nausea or fever. Liver conditions and lung problems on the right can also refer pain there.

Both sides or between the blades: often posture, neck or thoracic spine related. Rarely, a sudden tearing pain between the blades signals an aortic problem and needs emergency care.

Signs that point away from a muscle problem

Pain not affected by movement, position or pressing.
Pain brought on by exertion and relieved by rest.
Breathlessness, a cough with blood or pain with every breath after surgery, travel or immobility (possible blood clot).
Fever, night sweats or feeling generally unwell.
Pain after meals with upper abdominal discomfort.
Unexplained weight loss or a history of cancer.
Weakness, numbness or clumsiness in the arm or hand.

What helps at home

Keep moving within comfort; complete rest usually prolongs stiffness.
Use heat for 15–20 minutes to relax tight muscles; ice can help after a fresh strain.
Take regular breaks from sitting: every 30–45 minutes, stand, roll the shoulders and walk.
Set up your screen at eye level and keep the keyboard close to avoid reaching.
Sleep on your back or side with a pillow that keeps your neck level.
Paracetamol or an anti-inflammatory gel or tablet for a few days may help if suitable for you.
Gentle self-massage with a ball against a wall, avoiding pressing hard on bony points.

Exercises for shoulder blade pain

Shoulder blade squeezes: sit tall, draw the blades gently back and down, hold 5 seconds, 10 times.
Chin tucks: glide the head straight back to make a double chin, hold 5 seconds, 10 times.
Thoracic extension: sit with hands behind your head and gently arch your upper back over the chair back, 10 times.
Doorway chest stretch: forearms on the door frame, step forward until you feel a stretch, 30 seconds.
Thread the needle: on hands and knees, slide one arm under the body to rotate the upper back, 8 each side.
Rows with a band: strengthen the muscles between the blades, 2–3 sets of 12.
Stop any exercise that causes sharp, spreading or nerve-like pain.

How a physical therapist can help

A physical therapist examines the neck, upper back, ribs and shoulder to find the source of pain, screens for warning signs, and builds a plan that may include joint mobilisation, soft tissue work, posture and workstation advice, and a progressive strengthening programme. Most mechanical shoulder blade pain improves within two to six weeks. Persistent pain, pain with arm symptoms or pain that keeps returning deserves assessment.

Key points to remember

Most shoulder blade pain is muscular, postural or from the neck.
Pain linked to exertion, breathlessness, sweating or nausea needs emergency care, especially on the left and in women.
Right-sided pain after fatty meals may be the gallbladder.
Movement, heat, posture breaks and strengthening help most cases.

Questions about shoulder blade pain

These answers are general information and do not replace an examination or individual medical advice.

When should I worry about pain under my left shoulder blade?

Seek emergency help if it comes with chest pressure, breathlessness, sweating, nausea, light-headedness or pain in the jaw or arm, or if it is brought on by exertion. Pain that is clearly linked to movement and tender to touch is usually muscular.

Can stress cause shoulder blade pain?

Yes. Stress increases muscle tension in the neck and upper back and can make existing pain feel worse. Relaxation, exercise and regular breaks help.

Why does my shoulder blade hurt when I breathe?

Often a rib joint or muscle is irritated, which makes deep breaths catch. Pain with every breath plus breathlessness, fever or coughing blood needs prompt medical assessment.

How long does shoulder blade pain take to go away?

Muscular pain usually improves within a few days to six weeks. Pain lasting longer, or pain that wakes you at night and is not eased by position, should be checked.

Is heat or ice better?

Heat usually helps tight, aching muscles. Ice may be more comfortable in the first day or two after a sudden strain. Use whichever eases your pain.

Sources

This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.