Hello,
For ringworm, most cases of fungal infections respond to over-the-counter products, which contain any of several basic ingredients: miconazole, tolnaftate, terbinafine,ketaconazole and clotrimazole.You can consult a pharmacist and get any cream or lotion containing these ingredients. Some of them are Lamisil, Monistat derm, Mycelex, and Nizoral. However you need to get the diagnosis confirmed first.
I hope it helps. Take care and regards.
Your daughter needs to see a doctor to diagnose it correctly. And it's possible it could be something else, like Lyme's disease. Good luck!