Boutonnière Deformity of Finger



This problem may be caused by:

  • A cut to the top of the finger
  • A blow to the top of a bent middle finger with an object, such as a ball
  • Weak tendons from health problems, such as rheumatoid arthritis

Risk Factors

Rheumatoid arthritis can raise your risk of this problem.



Symptoms may be:

  • A cut to the top of the finger
  • Pain and swelling
  • Problems extending the finger
  • A change in the way the finger looks or feels


The doctor will ask about your symptoms and health history. A physical exam will be done. It will focus on the finger. You may be asked how the injury happened.

An x-ray may be done to check for a fracture.



A splint will be needed to protect the finger as it heals. Other options are:


Medicine may be needed to ease pain and swelling. It may be given by mouth or with an injection.

Antibiotics may also be used to treat an infection.


Some people may need surgery to repair the tendon. Exercises will also be given to help with finger strength and motion.


This injury often happens due to accidents. There are no guidelines to prevent it.

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.

Edits to original content made by Denver Health.