Differential Diagnosis for a Painful Lesion on the Bottom of the Foot
- Single Most Likely Diagnosis
- Plantar wart: This is the most likely diagnosis due to the description of the lesion and its location on the bottom of the foot. Plantar warts are common and can be painful, especially when pressure is applied to them while walking.
- Other Likely Diagnoses
- Corn or callus: These are areas of thickened skin that can develop in response to repeated pressure or friction, which could cause pain when walking.
- Plantar keratosis: A thickening of the skin on the bottom of the foot that can be painful, especially if it becomes inflamed.
- Ingrown toenail: Although typically found on the toes, an ingrown toenail can cause pain on the bottom of the foot if it becomes infected or inflamed.
- Do Not Miss Diagnoses
- Plantar melanoma: A type of skin cancer that can present as a new or changing lesion on the bottom of the foot. It's crucial to not miss this diagnosis due to its potential for serious consequences if left untreated.
- Deep tissue infection (e.g., plantar abscess): An infection that can cause significant pain and swelling, and if not properly treated, can lead to more severe complications.
- Foreign body (e.g., a splinter or glass shard): An object embedded in the foot can cause pain and potentially lead to infection if not removed.
- Rare Diagnoses
- Plantar fibroma: A rare, benign tumor of the foot that can cause pain and discomfort.
- Neuroma: A growth or tumor of nerve tissue that can cause pain, numbness, or tingling, typically between the toes but potentially on the bottom of the foot.
- Erythromelalgia: A rare disorder characterized by burning pain, heat, and redness in the hands and feet, which could potentially cause pain on the bottom of the foot.