My daughters leg I’m not sure where to post this at

So, Saturday my daughter stayed at her great grandmas house for the night.

Well, my grandma calls me at 10:00 pm and tells me not too worry she’s in the bath now, but she has blisters on her leg, I said blisters from what? She says I don’t know, she hasn’t played in the grass but was sitting on the concrete

Conversation continues at the end she told me she gave her Benadryl and Tylenol and rubbed some Benadryl cream on her blisters

Well I picked her up Sunday morning and looked at her leg looked fine nothing to really worry about well here we are Monday evening at 8:00 pm

Her blisters are bigger, and one was oozing some stuff I gave her more Benadryl and Tylenol...

They do not bother her, she does NOT scratch them, they aren’t warm to the touch she doesn’t have a fever, there are no bites just blisters.

Should I talk her to the doctor?