hi, i thought my 16 month old girl was teething (molars wise) she had a slight temperature of 38.5 Celsius but today seems to have a rather large blister in the middle of her top lip.  i suffer from cold sores, could this be her problem? and what can i do ,  shes seems to be in alot of pain...
Hi. Welcome to Chat Doctor. As per your complaint a large blister in the middle of upper lip can be due to causes like bacterial infection, allergy, bug bite but in case if it is in the form of a cluster of fluid filled blisters on the lip, and you already have a history of cold sores then it can be probably cold sores. I would therefore suggest you to consult a Pediatrician and get a proper investigation done as treatment will vary according to the diagnosis. As of now you can do cool compresses over the bump. You can apply numbing gel containing Lidocaine over the lump and give her Ibuprofen to relieve pain. In case of bacterial infection she can be advised antibiotic ointment along with oral antibiotics while in case of viral infection anti-viral medications like Acyclovir, Val acyclovir etc. can be advised. Hope this helps.