Dermatophytosis (Ringworm): This is a common fungal infection that can cause a rash with open sores, especially if scratched. It's highly contagious and can be spread by skin-to-skin contact or through contaminated objects.

Candidiasis: A fungal infection caused by Candida species, which can lead to open sores, especially in moist areas of the body. It's common in individuals with weakened immune systems or those who use antibiotics.
Intertrigo: A condition characterized by inflammation of skin folds, often caused by fungal infections. It can lead to open sores if not properly managed.
Eczema (Dyshidrotic): While not exclusively a fungal infection, eczema can sometimes be complicated by fungal superinfections, leading to open sores.

Histoplasmosis: A fungal infection that can cause skin lesions, including open sores, especially in immunocompromised individuals. It's crucial to diagnose early due to its potential severity.
Blastomycosis: Another serious fungal infection that can cause skin lesions, including open sores, and can disseminate to other parts of the body if not treated promptly.
Cryptococcosis: Particularly in immunocompromised patients, this fungal infection can cause skin lesions, among other symptoms, and is life-threatening if not diagnosed and treated.

Chromoblastomycosis: A rare fungal infection of the skin and subcutaneous tissue, characterized by the presence of sclerotic bodies, which can lead to open sores.
Mycetoma: A chronic, granulomatous infection of the skin and subcutaneous tissues caused by fungi or bacteria, leading to open sores and significant morbidity.
Sporotrichosis: A rare fungal infection caused by Sporothrix schenckii, typically acquired through skin prick injury from a contaminated thorn or soil, which can cause skin lesions and open sores.