A ringworm infection on the neck is a common fungal infection that causes itching and circular rashes, and it can usually be treated effectively with antifungal creams such as clotrimazole, terbinafine, or luliconazole applied twice daily for at least 2-4 weeks and continued for a few days even after the rash clears to prevent recurrence. Keep the area clean and dry, avoid scratching, and do not share towels or clothing to prevent the spread. It is important to avoid steroid-containing creams, as they can worsen the infection and delay healing. If the rash is spreading, not improving, or recurring, you should consult a doctor, who may prescribe oral antifungal medicines for complete treatment.

If your rash is not improving with clotrimazole, it may be a more stubborn or resistant fungal infection, or sometimes due to previous use of steroid-containing creams, which can make the infection harder to treat. In such cases, a stronger antifungal cream like terbinafine or luliconazole, used regularly for a sufficient duration, may be needed. Since your itching is persistent and worse at night, it is best to consult a doctor, who can confirm the diagnosis and prescribe the right treatment, including oral medicines if required, to clear it completely.