Ringworm isn't really a Urgent infection, like Heartworms, and other worms, so you don't need to take her to the hostpital in my opinion. but its really itchy, i had it once. it didn'h hurt, but it bothered me alot.
Ringworm is a relatively minor, if not, irritating infection. There is nothing to panic about. It is highly likely that your Mom will recover soon. The most obvious (and I'm assuming this is what your doctor would recommend) treatment is a clotrimazole-based cream. They are relatively cheap and can be purchased without a prescription from your local drug store. The links Krystal provided should also help you plenty. They'll cover in more detail that we can provide altogether. You beat it to me Krystal!