M60.045

Clinical Causes: Bacterial infections such as Staphylococcus aureus or Streptococcus species entering through cuts or wounds near the fingers Viral infections, including influenza or other viruses that can invade muscle tissue Parasitic infections, although rare, can also lead to myositis in specific regions or populations Spread of infection from adjacent tissues or systemic infections to the finger muscles Repeated trauma or injury that facilitates pathogen entry and muscle inflammation

Key Symptoms: Localized pain and tenderness in the affected finger muscles Swelling in the finger or surrounding tissues Redness or warmth over the affected area indicating inflammation Limited range of motion or difficulty moving the finger Muscle weakness in the affected fingers Fever and general malaise if the infection is systemic Sensitivity to touch in the affected area

Diagnosis Path: Medical history review, including recent infections or injuries Physical examination to assess swelling, tenderness, and functional limitations Blood tests such as complete blood count (CBC) to detect signs of infection Imaging studies, including ultrasound or MRI, to visualize muscle inflammation and rule out abscesses Muscle biopsy or culture in some cases to identify the infecting organism Laboratory tests targeting specific pathogens if a particular infection is suspected

Treatment Protocols: Antibiotic therapy tailored to the identified pathogen, often administered orally or intravenously for bacterial cases Antiviral medications when a viral cause is confirmed or highly suspected Rest and immobilization of the affected finger to prevent further injury Pain management with over-the-counter analgesics or anti-inflammatory medications Warm compresses to decrease swelling and promote circulation in some cases In severe or abscess-forming infections, surgical drainage may be necessary Addressing any underlying conditions or sources of infection to prevent recurrence