First, have you separated the two chins? It looks like she is being beaten up. I know you said you don't see them fight but they are. If you don't separate her now you might come home to a dead chin. I experienced this once with a pair of boys I was chin sitting and it was horrific. There were no previous signs of trouble. You are being presented with evidence of fighting, take it as a HUGE warning and separate them immediately.
I notice that you said you used Desenex, you were told to use Tinactin. They are different products with different active ingredients. This could be why she is itching. Tinactin: Tolnaftate (1%) Desenex: Miconazole Nitrate (2%).
Teeth grinding is a sign of pain. With those wounds she is in pain and will need pain meds.
I agree with Peggy, do not use hydrogen peroxide. It is indiscriminate in what it kills and will kill off healthy and healing tissue as well as bad things. I would use a saline solution to flush the wound.
I notice that you said you used Desenex, you were told to use Tinactin. They are different products with different active ingredients. This could be why she is itching. Tinactin: Tolnaftate (1%) Desenex: Miconazole Nitrate (2%).
Teeth grinding is a sign of pain. With those wounds she is in pain and will need pain meds.
I agree with Peggy, do not use hydrogen peroxide. It is indiscriminate in what it kills and will kill off healthy and healing tissue as well as bad things. I would use a saline solution to flush the wound.