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What are the symptoms of a torn muscle in the shoulder? Most people notice pain, weakness, stiffness, or trouble lifting the arm. Some also feel more pain at night or when they lie on the sore side.
People often call this a torn shoulder muscle. In many cases, though, the injury affects a rotator cuff tendon. Tendons connect the shoulder muscles to the bone. Knowing what was injured helps your doctor choose the right treatment.
Shoulder tears do not feel the same for everyone. Some start after a fall or sudden pull. Others build slowly from wear over time.
Common symptoms include:
Some rotator cuff tears cause very little pain. Weakness may be the first clue instead.
According to Mayo Clinic, sudden arm weakness after a fall or other injury should be checked promptly.
Pain alone does not tell you how serious a shoulder tear is. A small tear can hurt a lot, while a larger one may cause less pain.
Doctors often describe rotator cuff tears in two main ways:
| Type | What It Means |
| Partial-thickness tear | Part of the tendon is damaged, but it has not torn all the way through |
| Full-thickness tear | The tear goes through the tendon and may pull it away from bone |
Your doctor will also look at tear size, location, arm strength, and daily function.
A shoulder strain and a tear can feel very similar. Both may cause pain, weakness, and trouble moving your arm.
A physical exam is usually the first step. Your doctor may test your shoulder strength and range of motion. They may also check which movements cause pain.
Imaging can provide more detail.
X-rays can show arthritis, bone spurs, fractures, and other bone problems. They do not show a rotator cuff tear directly.
MRI and ultrasound give a better view of muscles, tendons, and other soft tissues.
Self-Assessment Guidelines
It is hard to diagnose a shoulder tear at home. Pain levels can also be misleading.
See a doctor if:
These signs do not always mean you have a tear. They do mean your shoulder deserves a proper exam.
Many mild shoulder injuries can start with simple care.
Try to avoid movements that clearly make the pain worse. Heavy lifting and repeated overhead work may also need to stop for a while.
You can also:
Do not force your shoulder through sharp pain.
Treatment depends on what is torn and how much the injury affects your daily life.
Physical therapy is often part of the plan. It can help you regain movement, strength, and control.
Pain medicine may also be used. Some patients may receive an injection when pain makes sleep or therapy difficult.
The American Academy of Orthopedic Surgeons, or AAOS, updated its rotator cuff guidance in 2025. The group found that physical therapy can improve symptoms in people with full-thickness tears. It also notes that some tears can grow over time.
When Is Surgery Required Versus Conservative Treatment?
Not every shoulder tear needs surgery.
Many people improve with physical therapy, activity changes, and pain care. This is often called conservative treatment.
Surgery may be considered if the tear is large, the shoulder feels very weak, or everyday tasks become difficult. It may also be an option after a sudden injury, especially if the tendon has pulled away from the bone. If pain and weakness continue even after physical therapy and other treatments, your doctor may recommend surgery.
When surgery is the right option, [shoulder surgery] may repair a damaged rotator cuff tendon by attaching it back to the bone.
The choice is different for every patient. Doctors look at tear size, age, activity level, symptoms, and treatment history before recommending surgery.
Recovery can take a few weeks or several months. It depends on the injury and the treatment you need.
Mild injuries often improve faster. Larger tears usually take more time.
Recovery also takes longer after surgery. Johns Hopkins Medicine notes that a repaired rotator cuff tendon begins healing to the bone over about six weeks. The connection becomes stronger over the following months.
Shoulder rehab usually starts with gentle movement. Strength work is added later as pain and motion improve.
A physical therapist may use exercises such as:
The AAOS includes these types of movements in its shoulder conditioning program.
Do not rush into strengthening after a serious injury. Your therapist can tell you when it is safe to add resistance.
Early rehab often starts with simple movements that help loosen the shoulder without putting too much strain on it. This may include pendulum swings, light stretches, and exercises that help control the shoulder blades. As the shoulder gets stronger, your therapist may add resistance band exercises. The right plan will depend on the type and size of the tear.
Physical therapy may last several weeks or a few months. A mild injury may improve sooner than a larger tear. Rehab after surgery often takes several months.
Avoid lying on the injured side while it is still causing pain. Try sleeping on your back or opposite side with a pillow supporting the sore arm. After surgery, follow your surgeon’s instructions before sleeping on that shoulder again.
Some shoulder tears can get larger with time. You may also develop more weakness or lose some shoulder motion. AAOS guidance notes that long-term rotator cuff tears may lead to changes in the nearby muscles.
Yes, many shoulder injuries can improve without surgery. Physical therapy may reduce pain and restore useful strength and movement. Your doctor may still monitor the tear if symptoms continue or get worse.
Your doctor will usually start with a physical exam. They may test your strength, movement, and painful areas. MRI or ultrasound may then be used to look for tendon or muscle damage.
Shoulder pain can make simple things like getting dressed, sleeping, or reaching overhead difficult. The good news is that many shoulder injuries improve with the right care. Getting an early diagnosis can help you avoid further strain and choose the treatment that fits your injury.
Ongoing shoulder pain or weakness should not be ignored. [Sunnyvale Sports Medicine] can examine your shoulder and help find the cause of your symptoms.
If [shoulder pain] keeps affecting your sleep, work, or daily activities, it may be time to get it checked. [Reach out] to the team today to discuss your symptoms and treatment options.
