Sorry nobody replied, i was away too.

you need to get flamazine ( the best) or any antibiotics cream without painkillers ( polisporin, neosporin or similar). Try to apply it to the damaged area 2-3 times a day, frog gotta be in a hospital set up. If not better within 5-7 days you will need to go for a vet to get systemic antibiotics. Dont wait these 5-7 days of you see it is getting worse.