Quick Answer: What Happens When You Hit Your Knee Cap Really Hard?

What happens when you hit your knee with a hammer?

The most familiar reflex is the knee jerk, when a doctor taps on the tendon below your knee with a reflex hammer and that leg kicks out.

The stimulus (the hammer) results in a signal being sent via a sensory nerve to the spinal cord..

When should you get a knee injury checked out?

Schedule a doctor’s visit Make an appointment with your doctor if your knee pain was caused by a particularly forceful impact or if it’s accompanied by: Significant swelling. Redness. Tenderness and warmth around the joint.

How do you tell if knee is sprained or torn?

What are the symptoms of a knee sprain?Pain around the affected area.Swelling around the sprained section of the knee.Knee instability, leading to your knee buckling under the pressure of your weight.Bruising, moderate to severe, depending on the sprain.A popping sound when the injury occurs.More items…•

How does a torn ligament feel?

Symptoms of a sprained ligament generally include pain, swelling, and bruising in the affected area. The joint may feel loose or weak and may not be able to bear weight. The intensity of your symptoms will vary depending on whether the ligament is overextended or actually torn.

Will my knee pain ever go away?

Knee pain will usually go away without further medical treatment, using only a few self-help measures.

What happens if your knee doesn’t reflex?

In a normal test, your knee will extend and lift your foot a little. A decreased or absent reflex may mean that there is compression in the L2, L3, or L4 region.

How do I know if my knee injury is serious?

Call your doctor if you:Can’t bear weight on your knee or feel as if your knee is unstable (gives out)Have marked knee swelling.Are unable to fully extend or flex your knee.See an obvious deformity in your leg or knee.Have a fever, in addition to redness, pain and swelling in your knee.More items…•

How long does it take for your knee to heal after falling on it?

Simple strains or sprains can last for one to two weeks. More extensive injuries requiring arthroscopic surgery may take one to three months to heal. Major traumatic injuries to the knee may take up to a year to heal.

When should you go to the ER for a knee injury?

If you cannot put weight on your knee, feel sick, or have a fever or if your knee is red and hot, you should also consider going to the ER to be evaluated by a doctor. You could have a broken bone or an infection.

What injuries can you get from falling on your knee?

Here are the eight most common knee injuries — from minor to severe — that can occur after a fall.Abrasion. An abrasion is another term for a scrape. … Laceration. A laceration is a cut or puncture wound that causes a tear or hole in the skin. … Contusion. … Sprain. … Torn meniscus. … Tendon tear. … Torn ligament. … Knee dislocation.

Can you still walk with a torn ligament in your knee?

Not always. And under the right circumstances, you can walk with a torn ACL. This can be both a blessing and a curse. Assuming that walking is approved by your physician, you should avoid any twisting, turning, and sudden movements.

What happens if you leave a broken knee untreated?

When a bone fracture is untreated, it can result in either a nonunion or a delayed union. In the former case, the bone doesn’t heal at all, which means that it will remain broken. As a result, swelling, tenderness, and pain will continue to worsen over time.

What are doctors looking for when they hit your knee?

Medical author Dr Janice Rachel Mae explains that doctors routinely use reflex tests to check if there are any problems in the nervous system involved in movement, nerve functioning or health of the connective tissue in the knee or leg.