What should you know about metacarpophalangeal joint sprain?

The metacarpophalangeal joint is where a finger or thumb meets the hand. A ligament sprain can happen when the joint is forced backward, sideways, or beyond its usual range. Tenderness may sit on one side of the knuckle, and gripping or bending may hurt. A mild sprain may remain stable; a more substantial injury can make the joint feel loose. A fracture or dislocation can look similar, so examination and sometimes an X-ray are useful.

Protect the joint from the motion that caused the injury and use cold wrapped in cloth for short periods during the early swelling phase. Elevating the hand can be comfortable. A clinician may recommend Splinting or taping to support the joint while the ligament settles. Once pain allows, guided movement helps restore flexibility, followed by gradual strengthening. Physiotherapy can help if stiffness, weakness, or fear of loading remains.

Seek prompt assessment if the finger or thumb is crooked, cannot bend or straighten, feels unstable, or has severe swelling. Urgent help is needed for numbness, unusual colour, cold skin, or an open wound. Arrange review if pain is not settling or if the joint remains difficult to use, since an untreated unstable ligament or hidden fracture may need specific support.

Ask whether the ligament is stable, whether imaging is needed, how long support should be worn, and when movement or sport can restart. Ask if taping, Splinting, or Physiotherapy fits the injury.