S63.64

Clinical Causes: Falling onto an outstretched hand with the thumb extended or abducted Direct blow or trauma to the thumb during contact sports Sudden twisting or hyperextension of the thumb during physical activity Accidental catches or jams involving the thumb during falls or collisions Overexertion or repetitive stress in activities involving gripping or pinching

Key Symptoms: Pain and tenderness around the MCP joint of the thumb Swelling and bruising around the affected area Restricted range of motion, especially during thumb movement Instability or a feeling that the thumb may give way Sensitivity to touch and pain when applying pressure or gripping objects

Diagnosis Path: Diagnosis typically involves a physical examination where a healthcare provider assesses thumb stability, swelling, and tenderness. Special tests may be performed to evaluate ligament integrity, including varus and valgus stress tests. Imaging studies such as X-rays can help rule out fractures and confirm ligament injuries, although MRI scans are useful if soft tissue damage is uncertain. The goal is to differentiate sprains from more severe injuries like ligament tears or fractures that require different treatments.

Treatment Protocols: Management of a sprain of the MCP joint often involves a combination of rest, ice, compression, and elevation (RICE) to reduce swelling and relieve pain. Immobilization with a thumb splint or brace is typically recommended to limit movement and support healing. Over-the-counter pain relievers may be used as advised by a healthcare professional. Progressing to physical therapy can help restore strength, flexibility, and normal function once symptoms improve. In cases of severe ligament tears, surgical intervention might be necessary to repair or reconstruct damaged tissues. Follow-up evaluations are essential to monitor healing and to determine when it’s safe to resume daily activities and sports.