Differential Diagnosis for Severe Itching on Both Feet when Exercising and Running
Single Most Likely Diagnosis
- Athlete's foot (Tinea pedis): This is a common fungal infection that thrives in warm, moist environments, making it a likely cause of itching on the feet, especially during exercise and running when feet are more prone to sweating.
Other Likely Diagnoses
- Contact dermatitis: Irritation from shoes, socks, or other materials that come into contact with the feet during exercise could cause itching.
- Eczema (Atopic dermatitis): Individuals with eczema may experience exacerbated symptoms, including itching, due to the friction and sweat associated with running and exercise.
- Sweaty feet (Hyperhidrosis): Excessive sweating can lead to itching and discomfort, especially in the context of exercise and running.
Do Not Miss Diagnoses
- Deep vein thrombosis (DVT): Although less common, DVT can cause itching, especially if there is associated skin irritation or inflammation. It's crucial to consider this due to its potential severity and risk of pulmonary embolism.
- Peripheral artery disease (PAD): Reduced blood flow to the feet can cause a variety of symptoms, including itching, especially during exercise when demand for blood flow increases.
Rare Diagnoses
- Pitted keratolysis: A bacterial infection that causes small pits in the skin of the feet and can lead to itching, especially in warm, moist conditions.
- Lichen simplex chronicus: A condition characterized by thickened skin due to chronic scratching, which could be a response to itching caused by other factors during exercise.
- Neurological conditions (e.g., neuropathy): Certain neurological conditions can cause itching sensations in the feet without a clear dermatological cause, though these would be less common and might be accompanied by other neurological symptoms.