B36.0

Clinical Causes: Overgrowth of Malassezia yeast on the skin Warm and humid weather conditions Excessive sweating Oily skin Weakened immune system Certain genetic predispositions Use of oily skin products Hormonal changes

Key Symptoms: Noticeable patches of skin that are lighter or darker than surrounding areas Scaling or flaking skin in affected areas Itching or mild irritation in some cases Areas typically affected include the chest, back, neck, and arms Discoloration that may become more apparent after sun exposure

Diagnosis Path: Diagnosis of pityriasis versicolor is primarily based on a physical examination by a healthcare provider. They may look for characteristic patches of discolored skin and perform a simple test called a KOH test, where a skin scraping is examined under a microscope to identify the presence of Malassezia yeast. Sometimes, a Wood's lamp examination, which involves UV light, is used to highlight the affected areas. Accurate diagnosis is essential to distinguish it from other skin conditions with similar appearances.

Treatment Protocols: Treatment options focus on reducing the yeast overgrowth on the skin and restoring normal skin color. Common approaches include: - Antifungal topical treatments such as creams, lotions, or shampoos (e.g., ketoconazole, selenium sulfide, or terbinafine) - In some cases, oral antifungal medications may be prescribed for extensive or stubborn cases - Maintaining good skin hygiene and keeping affected areas dry and clean - Avoiding excessive oiling of the skin and wearing breathable clothing - Regular use of medicated shampoos as a preventative measure, especially in humid climates While treatment can effectively clear the infection, skin discoloration may persist initially, and some pigmentation changes may take time to normalize. Recurrences are common, so ongoing skin hygiene and preventive measures are recommended.