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Torn Tendon in the Hand or Finger: Ultrasound Diagnosis in Fort Lauderdale

In-office tendon ultrasound with Dr. Jorge A. Gonzalez, MD, triple board-certified

If you suddenly cannot bend or straighten a finger or thumb after a cut, a fall or a forceful grab, a tendon may be torn. Tendon tears in the hand can be hard to pin down, and some need prompt surgical repair, so a fast, accurate diagnosis matters.

At the Institute of Regenerative Orthopedics & Sports Medicine (IROSM), Dr. Jorge Gonzalez, MD at IROSM in Fort Lauderdale uses high-resolution ultrasound in the office to find the tear, show whether it is partial or complete, and locate the torn ends to help plan your care. The video shows how he finds a tear.

Book Your Appointment Now: (954) 751-6990 Make an Inquiry Online
How Ultrasound Finds a Tendon Tear | Fort Lauderdale Sports Medicine
Important Notice from IROSM: Torn tendon evaluation is a customized medical service performed by Dr. Jorge Gonzalez. A thorough clinical evaluation at IROSM in Fort Lauderdale, including ultrasound, determines whether splinting and hand therapy, referral for surgical repair, or an alternative approach best fits your tendon injury.

What is a torn tendon in the hand or finger?

Tendons connect the forearm muscles to the bones of the fingers and thumb. Flexor tendons on the palm side bend the fingers; extensor tendons on the back of the hand straighten them. A tendon can tear partly or all the way through. When it tears completely, the torn end can pull back (retract) toward the palm or wrist, which is why the finger may stop working in one direction.

Flexor tendon tear

You cannot bend one or more joints of a finger. Often caused by a cut, or by a forceful grab, as in “jersey finger”, when a finger is pulled straight while gripping.

Extensor tendon tear

You cannot fully straighten a finger. A common example is mallet finger, where the fingertip droops after a jammed finger or a blow to the tip.

Torn tendon in the thumb

Thumb tendons can tear after a cut, a fall or, sometimes, wear from a wrist fracture or arthritis. If thumb pain is from inflammation rather than a tear, see our page on thumb tendonitis and De Quervain’s tenosynovitis.

Partial tears

Some tendons tear only partly. The finger may still move but feel weak, painful or catch. These need careful assessment, because a partial tear can progress.

Torn tendon in hand symptoms

Common signs of a hand or finger tendon tear

  • Cannot bend or straighten a finger or thumb joint
  • A finger that rests in an unusual position
  • Pain, swelling or tenderness along the finger or palm
  • Weak grip or pinch
  • A pop or snap at the time of injury
  • Numbness, if a nerve was also injured by a cut

Common causes include cuts from knives or glass, forceful grabbing, falls and sports injuries. Tendons weakened by rheumatoid arthritis, repeated steroid injections, or certain medicines, such as some antibiotics, may tear more easily. Clicking or locking without a clear injury is more often trigger finger, and numbness and tingling in the fingers can point to carpal tunnel syndrome.

A deep cut that is bleeding heavily, or a finger that is numb or pale, needs emergency care right away.

How ultrasound finds a tendon tear

A tendon tear in the hand can be hard to pin down by exam alone, and a retracted tendon end can be difficult to find even on MRI. Dr. Gonzalez uses high-resolution ultrasound for orthopedics and sports medicine to look at the tendon in the office, while you move the finger.

What an ultrasound exam can show

  • Whether the tendon is torn, and if the tear is partial or complete
  • Where the torn ends are, including a retracted end
  • The gap between the torn ends
  • Swelling of the tendon sheath or nearby structures
  • Retained glass or wood splinters after a cut

After a cut, ultrasound can also help find small foreign bodies left in the wound. Read about removing foreign bodies with ultrasound.

Torn tendon treatment: when surgery is needed

A complete tear of a flexor tendon usually needs surgical repair by a hand surgeon, and timing matters, so prompt evaluation is important. Knowing exactly where the torn ends are can help the surgeon plan the repair. Dr. Gonzalez can share the ultrasound findings with your hand surgeon, or help you find one, and works with referring surgeons on each patient’s care.

Some injuries, such as many cases of mallet finger and some partial tears, may be treated without surgery using a splint and hand therapy. Whether a non-surgical approach is appropriate depends on the type of tear, its size and your needs, and is decided after your exam and ultrasound.

What the Research Says

  1. Bekhet CNH et al., 2021, Ultrasound in Medicine & Biology: in 35 patients with hand or wrist injuries (50 injured tendons), ultrasound correctly identified full-thickness flexor tendon tears in every case in this study, when checked against surgical findings. The authors concluded that ultrasound is a reliable, cost-effective tool that can help guide surgical planning. Small study; results may differ in other settings. Source

Hand Tendon Tear Diagnosis in Fort Lauderdale

Providing hand and finger tendon injury evaluation with ultrasound to residents in Fort Lauderdale, Pompano Beach, Plantation, and Broward County. For our Hialeah office, se habla español.

Institute of Regenerative Orthopedics & Sports Medicine (IROSM)
3333 West Commercial Blvd, Suite 101
Fort Lauderdale, FL 33309
Phone: (954) 751-6990

Frequently Asked Questions About Torn Tendons in the Hand

How do I know if I tore a tendon in my hand?

How do I know if I tore a tendon in my hand?
Signs include not being able to bend or straighten a finger or thumb joint, a finger resting in an unusual position, pain and swelling along the finger or palm, and a weak grip. An exam and ultrasound can confirm whether a tendon is torn.

What are the symptoms of a torn tendon in the thumb?

What are the symptoms of a torn tendon in the thumb?
A torn thumb tendon may make it hard or impossible to bend or straighten the thumb, and may cause pain, swelling and weak pinch. Thumb pain without loss of movement is more often tendonitis, which is treated differently.

Can a torn tendon in the finger heal on its own?

Can a torn tendon in the finger heal on its own?
A complete tear of a flexor tendon usually does not heal properly on its own and often needs surgical repair. Some partial tears and many cases of mallet finger may be treated with a splint and hand therapy. Your exam and ultrasound guide the decision.

How is a torn tendon in the hand diagnosed?

How is a torn tendon in the hand diagnosed?
Diagnosis starts with an exam of how each finger joint moves. At IROSM, Dr. Gonzalez uses in-office ultrasound to see whether the tendon is torn, whether the tear is partial or complete, and where the torn ends are.

Why use ultrasound instead of MRI for a hand tendon tear?

Why use ultrasound instead of MRI for a hand tendon tear?
Ultrasound can be done in the office, lets the physician watch the tendon while you move the finger, and can help locate a retracted tendon end. MRI is still useful in some cases, and the choice depends on your injury.

How soon should I be seen after a hand tendon injury?

How soon should I be seen after a hand tendon injury?
As soon as possible. If a tendon needs surgical repair, timing matters, so prompt evaluation helps keep your options open. A deep, bleeding cut or a numb or pale finger needs emergency care right away.

Do I need a referral to be seen for a hand tendon injury?

Do I need a referral to be seen for a hand tendon injury?
It depends on your insurance. Many HMO, Medicare Advantage and Medicaid plans need a referral from your primary care doctor before you see a specialist. Please check with your plan, or call us at (954) 751-6990 before your visit to confirm.

Worried You Tore a Tendon in Your Hand?

Triple board-certified · Fellowship-trained at the Andrews Institute · Fort Lauderdale & Hialeah

Schedule a consultation with Dr. Jorge Gonzalez at IROSM in Fort Lauderdale for an in-office ultrasound to find out whether a tendon is torn and which next step is right for your condition.

Book Your Appointment Now: (954) 751-6990 Make an Inquiry Online
Dr. Jorge A. Gonzalez, MD
Medically reviewed by: Dr. Jorge A. Gonzalez, MD
Institute: Institute of Regenerative Orthopedics & Sports Medicine (IROSM)
Last reviewed: September 2026

Disclaimer: This content is for general educational purposes and does not constitute formal medical advice. Individual patient outcomes will vary. Torn tendon evaluation at IROSM in Fort Lauderdale requires a clinical examination by Dr. Jorge Gonzalez to establish candidacy. Serving Fort Lauderdale, Pompano Beach, Plantation, and surrounding Broward County communities.