Differential Diagnosis for Finger Felon
- Single most likely diagnosis
- Paronychia: This is the most common infection of the fingertip pulp, characterized by a collection of pus in the potential space between the skin and the periosteum of the distal phalanx. The symptoms include severe pain, swelling, and redness of the affected finger.
- Other Likely diagnoses
- Herpetic whitlow: A viral infection caused by herpes simplex virus, presenting with painful vesicles or ulcers on the fingertip.
- Bacterial abscess: A localized collection of pus in the soft tissue of the finger, which can be caused by various bacteria.
- Fungal infection: Fungal infections such as candidiasis or dermatophytosis can also cause felon-like symptoms.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Osteomyelitis: A bone infection that can occur as a complication of felon, which can lead to serious consequences if left untreated.
- Septic arthritis: A joint infection that can occur if the infection spreads to the joint, requiring prompt treatment to prevent long-term damage.
- Necrotizing fasciitis: A rare but life-threatening infection that can cause rapid progression of symptoms and requires immediate medical attention.
- Rare diagnoses
- Erysipeloid: A rare bacterial infection caused by Erysipelothrix rhusiopathiae, typically affecting individuals who work with animals or animal products.
- Sporotrichosis: A rare fungal infection caused by Sporothrix schenckii, typically affecting individuals who work with plants or soil.
- Melanoma: A rare but serious skin cancer that can present with similar symptoms to a felon, requiring prompt evaluation and treatment.