Whether you're washing a delicate wine glass, cleaning a vase or taking out the trash, glass injuries can happen in an instant. While many cuts are minor, others can damage the tendons, nerves or bones in your hand. These types of injuries can sometimes require surgery and months of rehabilitation.

What Should You Do if You Cut Your Hand on Glass?

If you have a minor cut and can move your fingers normally without numbness:

• Wash the wound gently with soap and water.
• Pat the area dry with a clean towel or gauze.
• Cover it with a clean, sterile bandage.
• Monitor the injury for signs of infection or worsening symptoms.

If the cut is deep, gaping or larger than about one-quarter inch:

• Apply firm pressure with a clean dressing to manage bleeding.
• Seek prompt medical evaluation, as stitches may be needed to help the wound heal properly.

If a large piece of glass is visibly protruding from the wound and can be removed easily, Dr. Kiesler says it may be removed before applying pressure and seeking medical care. However, he cautions against trying to explore the wound yourself.

“If you can't clearly see the glass, don't dig around trying to remove it,” Dr. Kiesler says. “You could cause additional damage to tendons, nerves, blood vessels or surrounding tissue.”

When Is a Glass Cut More Than “Just a Cut”?

Some cuts only affect the skin, while others damage deeper structures that allow your hand to move and feel.

Signs of a tendon injury

Tendons connect muscles to bones and make movement possible. If a tendon is cut, you may lose the ability to bend or straighten a finger. Flexor tendon injuries commonly occur from cuts to the hand or fingers and often require surgical repair because completely severed tendons cannot heal properly on their own.

Warning signs include:

• Inability to bend or straighten a finger
• Sudden loss of motion after a sharp laceration
• Pain when attempting to move the injured finger

Signs of a nerve injury

Nerves provide sensation and control muscle function. A cut nerve can cause numbness, weakness or both. Depending on the location of the injury, important nerves, such as the median nerve, ulnar nerve or another motor nerve may be affected.

Nerve injuries may result in loss of feeling, muscle weakness or painful nerve scars called neuromas if left untreated. Damage to sensory nerves can significantly affect feeling in the hand and fingers.

Dr. Kiesler recommends seeking prompt evaluation if you experience:

• Numbness that does not improve
• Persistent loss of sensation
• Weakness in the hand or fingers

Some injuries involve both tendons and nerves, causing both numbness and difficulty moving the affected area.

When Should You Seek Immediate Medical Care?

Seek prompt evaluation at an urgent care center or emergency department if you have:

• Inability to bend or straighten a finger
• Persistent numbness
• Heavy bleeding that does not stop with direct pressure
• A deep or widely open wound
• Concern that glass remains in the wound

During your evaluation, a doctor will examine your hand and may order imaging, such as an X-ray, to look for fractures or retained glass fragments. Additional imaging may sometimes be used when tendon or nerve injuries are suspected.

“Little shards of glass sometimes can be buried within the tissues and can’t be seen on an X-ray,” says Dr. Kiesler.

Be sure to discuss all your symptoms with your doctor, especially if you have a persistent sensation of a splinter or something stuck in the wound. This may indicate a retained glass fragment or other foreign body.

Depending on the severity of the injury, a laceration or superficial skin tear may require stitches to promote proper healing and reduce the risk of complications.

Signs of Infection

Even minor cuts can become infected. Contact your doctor if you notice:

• Increasing redness around the wound
• Swelling that continues to worsen
• Drainage or pus
• Fever
• Increasing pain several days after the injury

Why Is It Important Not To Delay Treatment?

When tendons or nerves are cut, timing matters.

Dr. Kiesler says tendon repairs are ideally performed within 24 to 72 hours of injury, although good outcomes may often still be possible when injuries are recognized within five to seven days. Nerve repairs also have the greatest chance of success when performed as early as possible.

Delaying treatment can allow injured tendons and nerves to deteriorate. Nerves may develop painful neuromas that require additional reconstruction, and larger gaps between nerve ends may make primary repair impossible. In some severe cases, nerve grafting may be necessary to bridge the gap and restore function.

Untreated nerve injuries can result in permanent loss of function, while prompt evaluation improves the likelihood of successful treatment.

What Happens if Surgery Is Needed?

Depending on the injury, surgery may involve repairing tendons, nerves, broken bones or a combination of these structures. The length of surgery depends on the extent of the injury.

After surgery, your hand is often placed in a splint to protect the repair while healing begins. Skin sutures typically remain in place for about 12 to 14 days. Recovery from tendon or nerve repair usually takes three to four months and includes specialized hand therapy.

The American Academy of Orthopaedic Surgeons recommends working closely with a hand therapist after tendon repair to restore movement while protecting the healing tendon.

Even after healing, stiffness and scar tissue can temporarily limit range of motion, and some patients require additional procedures to improve movement.

“The biggest thing patients can do to help themselves is to be aggressive and consistent with their therapy recommendations,” says Dr. Kiesler. “Rehabilitation plays a critical role in regaining strength and function.”

How Do Glass Hand Injuries Happen?

Glass injuries often occur during everyday activities around the home and can happen in an instant.

According to Dr. Kiesler, some of the most common causes include:

• Washing or drying thin wine glasses
• Cleaning glass vases
• Handling broken glass
• Pushing down trash with an unprotected hand when broken glass may be hidden inside
• Applying too much pressure while holding glass holiday ornaments or oversized lightbulbs

Higher-impact injuries, such as those sustained in motor vehicle crashes, are often more severe. These injuries can cause a larger area of tissue damage and are more likely to be associated with fractures, tendon injuries or significant nerve damage to the hand.

How Can You Prevent Glass Hand Injuries?

Many glass-related hand injuries can be avoided with a few simple precautions.

Dr. Kiesler recommends:

• Never use your hand to compress garbage in a trash can.
• Use a long-handled bottle or glass brush instead of placing your hand inside a wine glass.
• Handle delicate glassware carefully and avoid rushing.
• Take extra care when cleaning glass vases or other fragile containers.

He also recommends, “Instead of applying pressure to get residual dried wine stains from the bottom of the glass, let them soak in water. A few extra moments of caution can prevent an injury that may take months to recover from,” says Dr. Kiesler.

While many glass cuts heal without complications, injuries involving tendons, nerves or other deeper structures can have lasting effects if they are not treated promptly. If you experience numbness, difficulty moving a finger or any concern that a wound may be more serious than it appears, seek medical attention. Early evaluation and treatment offer the best chance for a full recovery.