My dog is sick what should i do?

Brief：
My dog is trying to bite is nail and is fur and he also has been throwing up.He tiltes is head againist the ground and rubs it againist it.Any idea wh.. 

My dog is trying to bite is nail and is fur and he also has been throwing up.He tiltes is head againist the ground and rubs it againist it.Any idea what sickness he has.

Hey, I think I may have a couple of answers for you. Definitely by all means see a vet but these are a couple of possible problems with your dog:

I have a maltese, and just a month ago, she did the same thing, tilting her head to the side and shaking her head back to forth every so often. We took her to the vet and found out she had an ear infection from the groomer. Apparently, without meaning to cause harm, water had gotten into her ear and caused it to become affected. With some help from the vet for ear medicine, my dog was better within a week and back to her old playful ways.

As for biting her feet; her nails, I feel it could be allergies. Dogs are just like humans allergic to one or more countless things. It can be a number of causes. My dog also had this problem and we found out she was allergic to dust mites! However, with the help of some medicine from the vet again, she began feeling better and thankfully her front leg has healed.

I hope its nothing severe and the vet will definitely find the problem in no time at all. I recommend asking the vet if your dog has a possible ear affection. Good luck! take him to the vet. Bring him to the vet. I don't know what kind of sickness your dog has but you should take it to the vet asap. take him to the vet Could be severe allergic reaction and/or poisoning, either internal or something on his skin or fur. Definitely the Vet, this is not one to wait and see or it could cost him his life. i don't what sickness he has maybe u should bring it toa doctor. take him to the vet. sorta sounds like rabies to me. but it may not be that serious. It's nearly impossible to diagnose a dog on the internet without without actually examining him. It could be any any number of things and a lot also d depends on his age and how long he has being acting this way. If he is still a pup, the vomiting could cause him to become dehydrated very quickly as well.