Differential Diagnosis for Right Foot Pain and Swelling
Single Most Likely Diagnosis
- Ankle Sprain: This is a common injury that can cause pain and swelling in the foot, especially if the patient has recently experienced a traumatic event such as a fall or twist. The symptoms of an ankle sprain can last for several weeks, making it a plausible explanation for a 2-week history of pain and swelling.
Other Likely Diagnoses
- Cellulitis: A bacterial skin infection that can cause redness, swelling, and pain in the affected area. Given the duration of symptoms, cellulitis is a possible diagnosis, especially if there's a history of trauma or skin breach.
- Plantar Fasciitis: Inflammation of the plantar fascia, which can cause pain and swelling in the heel and bottom of the foot. This condition is common and can be exacerbated by activities that put stress on the heel and foot.
- Gout: A form of arthritis characterized by sudden, severe attacks of pain, swelling, redness, and tenderness in one or more joints, most often in the big toe. However, it can affect other parts of the foot as well.
Do Not Miss Diagnoses
- Deep Vein Thrombosis (DVT): Although less common in the foot, DVT can cause swelling and pain. It's crucial to consider this diagnosis due to its potential for severe complications, such as pulmonary embolism, if left untreated.
- Osteomyelitis: A bone infection that can cause pain, swelling, and redness in the affected area. This condition requires prompt treatment to prevent serious complications.
- Compartment Syndrome: A condition resulting from increased pressure within a muscle compartment, which can lead to muscle and nerve damage. It's a medical emergency that requires immediate attention.
Rare Diagnoses
- Erythromelalgia: A rare disorder characterized by burning pain, heat, and redness in the hands and feet. It can be primary or secondary to other conditions.
- Complex Regional Pain Syndrome (CRPS): A chronic pain condition that most often affects one of the arms, legs, hands, or feet after an injury or trauma. It's characterized by intense burning or aching pain in the affected area.
- Lymphoma or Other Malignancies: Although rare, certain types of cancer can initially present with swelling and pain in the foot due to tumor growth or metastasis.