Differential Diagnosis for Skin Problem with Itchiness and Redness on Dorsum of Foot
- Single Most Likely Diagnosis
- Contact Dermatitis: This is a common condition that occurs when the skin comes into contact with an irritant or allergen, leading to itchiness and redness. The dorsum of the foot is a common site for contact dermatitis due to friction from shoes or exposure to allergens like certain materials or chemicals in footwear.
- Other Likely Diagnoses
- Eczema (Atopic Dermatitis): A chronic skin condition characterized by itchy, inflamed skin. It can occur anywhere on the body, including the feet, and is often associated with allergies or asthma.
- Psoriasis: An autoimmune condition that speeds up the life cycle of skin cells, causing cells to build up rapidly on the surface of the skin. The dorsum of the foot is a less common site but can be involved, especially in cases of palmoplantar psoriasis.
- Tinea Pedis (Athlete's Foot): A fungal infection of the foot that can cause itchiness, redness, and sometimes blisters. While it more commonly affects the soles and between the toes, it can spread to other areas of the foot.
- Do Not Miss Diagnoses
- Cellulitis: A bacterial skin infection that can cause redness, swelling, and warmth of the skin. It's crucial to diagnose and treat promptly as it can spread and lead to more severe infections.
- Deep Vein Thrombosis (DVT): Although less common on the dorsum of the foot, DVT can cause redness and swelling. It's a critical condition to identify due to the risk of pulmonary embolism.
- Rare Diagnoses
- Pityriasis Rubra Pilaris: A rare skin disorder that causes constant itching, redness, and scaling. It can affect any part of the body, including the feet.
- Keratoderma: A group of rare skin conditions that cause thickening of the skin on the palms and soles, which can sometimes extend to the dorsum of the foot, leading to redness and discomfort.
- Erythromelalgia: A disorder that causes burning pain, heat, and redness in the hands and feet. It's less common but can be associated with myeloproliferative disorders, making it important to diagnose.