Is it average for the inside of your vagina to be bumpy? ?
Answers: I don't think so...it almost sounds as if you own a rash. Even a latex allergy. Have you recently have sex using a condom? You may have a latex allergy or even a reaction to the spermicide or lubricant.
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I would step see a doctor about that.
Has it suddenly appeared?
Have you been sexualy busy without protection?
Have you shaved or used any kind of creams?
There will be alot of question you will ask yourself and the doctor will ask them too until they know what it is.
Goodluck!