Final answer:
Scalp ringworm, or tinea capitis, is a highly contagious fungal infection prevalent among children. It is caused by dermatophyte fungi, and treatment typically requires prescription oral medications.
Step-by-step explanation:
Scalp ringworm, also known as tinea capitis, is a superficial fungal infection that affects the scalp. It is highly contagious and is commonly found among children who come into close contact with one another. This type of fungal infection is not related to psoriasis or caused by blocked hair follicles containing pus. Instead, tinea capitis is caused by a group of fungi known as dermatophytes, particularly the Trichophyton species. These organisms thrive on keratin, a protein found in hair, skin, and nails, leading to symptoms such as patchy hair loss and a scaly scalp. It is important for individuals with tinea capitis to seek medical treatment, as over-the-counter antifungal creams and powders are typically not sufficient. Prescription oral medications may be necessary for effective treatment.