Tinea unguium

Tinea unguium is a common fungal infection that affects the nails, primarily on the fingers or toes. It involves the thickening, discoloration, and sometimes crumbling of the nail, which can cause discomfort and affect nail appearance. This condition is caused by fungi called dermatophytes, which thrive in warm, moist environments. The infection can spread slowly and may lead to nail damage if untreated. It mainly impacts the skin and nail system, interfering with normal nail growth and health. People with weakened immune systems or those who frequently expose their feet to damp conditions are more prone to this infection.

Tinea unguium, also known as onychomycosis, is a chronic fungal infection of the nail plate and nail bed caused predominantly by dermatophytes such as Trichophyton rubrum. The infection leads to onycholysis, subungual hyperkeratosis, and nail plate thickening. It is the most common nail disorder worldwide and represents a significant cause of nail dystrophy. The fungi invade keratinized tissues, disrupting normal nail architecture and causing discoloration, brittleness, and deformity. The condition is clinically significant due to its potential to cause secondary bacterial infections and its impact on quality of life. Diagnosis is important to differentiate from other causes of nail changes such as psoriasis or trauma.