scratching burned skin is terribly unhealthy for the healing process, scaring and being prone to infection. The best thing to do if burned by the sun or fire badly is to take pills that lesson the itch and apply specific ointment for your injury. If your burn is not mild and is worse i recommend seeing your local doctor.
Usually, yes. Psoriasis is damaged skin, and scratching only damages more skin.
When you scratch, it means that your skin is already irritated for some reason. Scratching only continues to irritate the skin more.
excoriation
ewan
Scratching, rubbing or stroking.
Blisters are the one which will develop when a skin gets burned
White patches of skin, Itchyness, and depression.
80%
if you break the skin or leave a red welt
Yes
DEPENDS which layer of the skin is burned
Dogs don't molt, they "shed," and normally shedding shouldn't cause a lot of scratching, but some scratching might be caused it. Lots and lots of scratching means that the dog may have a skin irritation (bug bite, poison ivy, eczema, hot spot infection, etc.), so look closely at the skin where the dog is scratching and consult with a vet.