My dog has a blister ... help

Question
Hi,
 My dog has a blister on her face. What causes this blister? sickness? fever, insect bite, alergic? She had the blister a fewq weeks ago then it naturally busted. Then, it went a away for a day. Then, it reoccur again. Please help me find out what is it.. How may I cure this.. I'm a student. I can't affford going to the vet. Thank you.



                          Thank you,
                         Sara T

Answer
Hi Sara! Are you sure that these are blisters or can they be warts? Blisters can be caused by many things such as insect bites,allergies or some come of reaction to certain chemicals or additives. Without being able to see your dog it is hard to determine this. Maybe you can call your vet and just ask the receptionist a few questions.I wish I could help you out more!Please keep me posted and good luck!Give that doggie some kisses for me!
Nicole.D.