Differential Diagnosis for Red Swollen Right Hand
- Single Most Likely Diagnosis
- Cellulitis: This is the most likely diagnosis due to the common presentation of redness and swelling in the affected hand, which are hallmark signs of a bacterial skin infection.
- Other Likely Diagnoses
- Contact Dermatitis: An allergic reaction or irritant contact dermatitis could cause redness and swelling, especially if the individual has been exposed to a new substance or has a history of allergies.
- Insect Bite or Sting: Certain insect bites or stings can cause localized redness and swelling, and the hand is a common area for such incidents.
- Trauma: A recent injury to the hand could lead to swelling and redness due to inflammation and possible infection.
- Do Not Miss Diagnoses
- Necrotizing Fasciitis: Although rare, this condition is life-threatening and requires immediate medical attention. It presents with severe pain, swelling, and redness, often with a history of trauma.
- Septic Arthritis: Infection within a joint can cause significant swelling, redness, and pain. It's crucial to identify and treat promptly to avoid long-term joint damage.
- Deep Vein Thrombosis (DVT): While less common in the hand, DVT in the arm can cause swelling and redness. Given the potential for pulmonary embolism, it's a critical diagnosis not to miss.
- Rare Diagnoses
- Erythema Multiforme: A skin condition characterized by target lesions, which can sometimes present with redness and swelling, particularly if the hands are involved.
- Scleroderma: A chronic autoimmune disease that can cause skin thickening and swelling, among other symptoms. Hand involvement is possible, though it's a less common initial presentation.
- Complex Regional Pain Syndrome (CRPS): A condition characterized by intense burning or aching pain in the hands or feet after an injury or trauma, which can also present with swelling and redness.