Hi welcome to HCMForum. Every thing has happened around the scratches of the puppies teeth. there is no itching. so it appears to be the infection, & not allergy
. as the body resistance comes into action every thing has subsided. If it is still brown & peeling i advise you to consult a dermatologist
Besides i advise you some diet recomendations as, avoid eating cereals, fish, and tubers.
Also advise you to eat green leafy vegetables, eggs , meat and chicken to build up resistance.
Wishing for an early recovery.