Differential Diagnosis for Pain in Right Foot

Single Most Likely Diagnosis

• Plantar fasciitis: This is the most common cause of foot pain, especially in the heel area. It is often related to overuse, poor foot mechanics, or inadequate footwear, leading to inflammation of the plantar fascia.

Other Likely Diagnoses

• Morton's neuroma: A common condition characterized by a benign growth of nerve tissue in the foot, typically between the third and fourth toes, causing pain, numbness, or tingling.
• Tendinitis: Inflammation of the tendons in the foot, such as the Achilles tendon or peroneal tendons, often due to overuse or repetitive strain.
• Bunions: A bony bump that forms on the joint at the base of the big toe, causing pain, redness, and swelling, especially if the bunion is large or becomes inflamed.
• Metatarsalgia: Pain and inflammation in the ball of the foot, often due to poor foot mechanics, overuse, or wearing high heels.

Do Not Miss Diagnoses

• Deep vein thrombosis (DVT): A blood clot in the deep veins of the foot or leg, which can be life-threatening if it breaks loose and travels to the lungs (pulmonary embolism).
• Osteomyelitis: A bone infection that can cause severe pain, swelling, and redness in the foot, often requiring prompt antibiotic treatment or surgery.
• Gout: A form of arthritis characterized by sudden, severe attacks of pain, swelling, and redness in the joints, often starting in the big toe.
• Diabetic foot ulcer: A complication of diabetes that can cause pain, numbness, and ulcers on the foot, especially if left untreated or poorly managed.

Rare Diagnoses

• Erythromelalgia: A rare disorder characterized by burning pain, heat, and redness in the feet, often related to underlying conditions such as myeloproliferative disorders.
• Complex regional pain syndrome (CRPS): A chronic pain condition that can cause severe, burning pain in the foot, often after an injury or trauma.
• Foot tumors: Rare benign or malignant tumors that can cause pain, swelling, or lumps on the foot, such as osteochondromas or synovial sarcomas.
• Peripheral artery disease (PAD): A condition characterized by narrowed or blocked arteries in the legs, which can cause pain, cramping, or weakness in the foot, especially during exercise.