A Round Open Sore With a Lump Beside It

An open, round sore with raised edges and a lump under the skin nearby isn't typical of ringworm, which usually causes dry, scaly patches of hair loss. More likely causes include a skin infection or abscess, an irritated area from licking, or a growth, and these need a vet to examine them. A rare deep form of ringworm called a kerion can also form a raised lump, which is another reason to have it checked.

Please have her seen within a day or two, especially because of the lump, and the same day if the swelling grows quickly, feels hot or very painful, oozes, or she seems unwell, stops eating or has a fever. Your vet may take a swab or a small sample from the lump. Until then, keep the area clean and dry, and stop her licking it, for example with a cone.

See ringworm in dogs and hot spots on dogs.

This is general information, not a diagnosis. Please follow your own vet's advice.