My poor baby has sores on her tail and is biting at them constantly
 

I feel so bad for her. She had been doing this on and off all summer but the last week its really been bad. I check her daily for fleas as everyone said that thes likely problem. Despite using a flea comb, I have not ever found one flea. I have two other dogs who have no problems with scratching either.
IThe last few days she will be sleeping peacefully and then wake up suddenly and bite ferociously at the area for a good long time. Tonight i looked closely at the back of her tail and she has several sores there...they are red, not really raised and have whitish centers. What could they be...are these what hot spots are, what causes them and what came I do to help her? What else could they be? I guess we will have to go to the vet again tomorrow...God I hate to spend the money when I know all he will do is give us Temeril P and do nothing else. The Temeril does seem to help a little but Id love to know what is causing this so she doesnt have to suffer anymore. Is there any spray or ointment I could use to help control the itching? Ive seen some of both at the petstore but I worry they could make her sick if she licks them and she will definitely lick the area

Is your yorkie on any kind of flea prevention? if not check for black sand instead of fleas...if your see some try to pick it off and drop it in water. If it dissolves you DO have fleas.

I cannot tell you how mnay dog owners have come into my groom salon daily and were shocked their dog had fleas.

Could she have allergies?

I would give your baby some benedryl ( will help to rest and itching) and put some hydrocortison on the area. Itching is miserable. I wish you the best.

Have you tried a different vet and has blood work ever been done for this?

It sounds more like an allergy to me then fleas. You'd think the other 2 would have the same problem if it was fleas. Food allergy or something airborne is more likely. I would be looking for a different vet if they are only willing to continue treating as they have in the past. Obviously that treatment isn't working.

Poor baby:getwellso