Tinea pedis

Overview


Plain-Language Overview

Tinea pedis is a common fungal infection that affects the skin of the feet, especially the areas between the toes. It is caused by fungi called dermatophytes, which thrive in warm, moist environments like sweaty shoes. The infection often leads to itching, redness, and peeling skin, which can be uncomfortable and sometimes painful. It primarily involves the skin system, disrupting the normal barrier and causing inflammation. If untreated, it can spread to other parts of the foot or even to other people through direct contact or shared surfaces. The condition is sometimes called athlete’s foot because it frequently affects people who are active or wear tight footwear. Overall, it impacts daily comfort and foot health.

Clinical Definition

Tinea pedis is a superficial cutaneous infection caused by dermatophyte fungi, primarily species of Trichophyton, that invade the keratinized layers of the skin on the feet. The pathogenesis involves fungal colonization of the stratum corneum, leading to an inflammatory response characterized by erythema, scaling, and pruritus. It is the most common dermatophytosis and is highly contagious, often transmitted via fomites or direct contact. The infection typically affects interdigital spaces but can also present as moccasin-type or vesiculobullous forms. Clinically, it is significant due to its potential for chronicity, secondary bacterial infection, and impact on quality of life. Diagnosis is based on clinical presentation supported by laboratory confirmation. Understanding the fungal etiology and host factors is essential for effective management.

Inciting Event

Locked content

Latency Period

Locked content

Diagnostic Delay

Locked content

Clinical Presentation


Signs & Symptoms

Locked content

History of Present Illness

Locked content

Past Medical History

Locked content

Family History

Locked content

Physical Exam Findings

Locked content

Diagnostic Workup


Diagnostic Criteria

Locked content

Pathophysiology


Key Mechanisms

Locked content

Organs

Locked content

Tissues

Locked content

Cells

Locked content

Chemical Mediators

Locked content

Treatments


Pharmacological Treatments

Locked content

Non-pharmacological Treatments

Locked content

Prevention


Pharmacological Prevention

Locked content

Non-pharmacological Prevention

Locked content

Outcome & Complications


Complications

Locked content

Short-term Sequelae

Locked content

Long-term Sequelae

Locked content

Differential Diagnoses


Differentials

Locked content

Medical Disclaimer: The content on this site is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. If you think you may be experiencing a medical emergency, call 911 or your local emergency number immediately. Always consult a licensed healthcare professional with questions about a medical condition.

Artificial Intelligence Use: Portions of this site’s content were generated or assisted by AI and reviewed by Erik Romano, MD; however, errors or omissions may occur.

USMLE® is a registered trademark of the Federation of State Medical Boards (FSMB) and the National Board of Medical Examiners (NBME). Doctogenic and Roscoe & Romano are not affiliated with, sponsored by, or endorsed by the USMLE, FSMB, or NBME. Neither FSMB nor NBME has reviewed or approved this content. "USMLE Step 1" and "USMLE Step 2 CK" are used only to identify the relevant examinations.