thanx for the query
firstly would like to advicce you try never to skip brushing , twice daily is mandatory.
Incase you forgot to bring your toothbrush along buy a new one , toothbrushes are available in most grocery shop, still in case you have no tooth brush then make sure to rinse well with water after every meal.
u can have a sugar free chewing gum, it helps clear all debris in mouth. try to have apple or similar kind of fruits they help in teeth cleansing.
u can have a ROLLY disposable tooth brush which is a small circular disc similar to ur chewing gum but has bristles on it , use it and spit it like a gum later.
now coming on to ur complaint of skin peeling from inside of tooth, it mainly happens due to hard nutty or dried deep fried stuff which is hard on inner lining of skin inside mouth... it gets okie on its own, hope fully nothing much to worry about.
try to stick to proper oral hygiene
regime and if it again happens visit a dentist