Hello and welcome to FF Michele! Hum... my first response is to take frog to a herp veterinary. That large light colored area in the frog's shoulder does not look good at all. Is it just a discoloration, or is there any elevation to it? You mentioned a possible recent injury; was frog skin broken in that area?

If it's an open wound; recommend move frog to a hospital like enclosure. If it's an infected injury; need to get a plain topical antibiotic without any painkillers. Neosporin will work, so will silver based ones. You can apply with a Q-tip over the affected area twice daily.

Your humidity is quite high for a White's; think 65% is about right. Also, they do require good ventilation and a basking spot that gets to 85F (30C) during the day. Please answer above questions to try and figure out what is the problem. Good luck !