Ay, that sounds concerning talaga, pus with red surroundings and you just woke up to it is definitely worth getting checked by a doctor ASAP, kasi hindi lang ringworm ang pwedeng mag-appear na ganyan, could be a skin infection or something else na kailangan ng proper treatment. Not all skin infections are itchy, so don't rely lang sa itch to rule things out, one of my mum friends had something similar na akala niya minor lang pero kailangan ng antibiotics pala, so better safe than sorry!