Hi, My Daughter Is 8 Years Old, And Has Been

Hi, my daughter is 8 years old, and has been experiencing a tummy ache for a week now..with slight headaches. I have noticed a blister on her top lip as well. There is also a matter of a brownish discharge down there, that's been there for a while. Doctors say she may be wiping the wrong way. Not sure,but i'm very concerned.

Thank you.