The dog may have gotten a bug bite and the poison injected by the bug causes the swelling. It should heal in time. A little witchazel applied will help soothe. If it is a cyst, it should clear by itself, but if it doesn't you may have to bring him to a vet to have lanced properly. Like I say, give it a few days and wait to see. If it is getting worse, get him to a vet for proper diagnosis
My Dog Has A Large Lump On His Snout Which Is Hard But Not Real Painful To Him Unless You Press On It. What Could This Be?
My dog had one too (on his tail). The vet told me don't worry as long as it dosent hurt. If it starts to hurt it mat be a cyst. And they will do a test. If it is a cyst they will remove it so the discomfort goes away.
I don't think that burning the lump is a good idea... You can tell if its a tick or a lump.... The tick will burry its head under the skin leaving the back end out.... and if it is a tick, salt will get the tick to "back out". don't rip it out because the head will remain under the skin and continue to release anti-coagulant. There also is a posibility of contracting lymes disease from a tick as well.....Please please don't try and burn it out....
If your dog was nutered or spayed, then it's perfectly normal for dogs to grow abnormal lumbs, it's either that or a tick. Try heating a piece of metal, than sticking in on the dogs bump. If it doesn't come off, it's a nutered thing like I said before.