Hello, you need to go to the doctor as soon as possible. It could be hives, scabies or allergic reaction. But, unfortunately, you gave too little information to put any diagnosis.
Sorry, I've put this answer into the wrong box. Scarlet fever is a disease resulting from infection with streptococcus. It Cause similar symptoms as sunburn.
It could be inflammation of the corners of the mouth. This is usually caused by a lack of vitamins.
this disorder has many reasons. it can be infection or lack of the vitamins. also it can be vitaligo. so you should take some vitamins. i recommend you site where i always take pills, medicine: http://my-drugstore.us/20-vitamins