My Border Collie has a lump after fleas. Is it flea-related?

These lumps are not typical of a flea allergy dermatitis. That typically is just a superficial rash with itching, hair loss, scabs, etc. These lumps are concerning. Your pet may have developed abscesses which are deeper infections that form pockets of pus or infectious fluid. This is worth a trip to the vet for a recheck. I do not feel that it is a life threatening emergency, but it should be addressed by your veterinarian as soon as regular business hours resume. Your pet may need prescription antibiotics, the lumps may need to be aspirated or checked with a needle and if they are full of pus, they should be drained. Please have your vet recheck him as soon as possible,

Hello and thank you very much for your question. Fleas can be so frustrating and I sympathize with what you were going through. What has to happen for your dog to heal and for the lump to possibly go down, Is for the itch cycle and the inflammation to be stopped. A visit to the local veterinarian is a must in this situation because they will have strong prescription strength flea preventative as well as steroids that can be given to your dog to stop the fleas and therefore the dermatitis that’s associated with their biting. I urge you not to use any further over-the-counter flea preventative or skin medications without the approval from your veterinarian. This will only delay the healing and may exacerbate the problem. The lump should go down with time as long as the fleas are killed and the inflammation of the skin is controlled. But, if the lamp does not go away within the next two months, you may want to have your veterinarian take a biopsy of it just to see if it is indeed even related to the fleas. Does that make sense? I appreciate you reaching out to our service. I hope I’ve helped you today.

You can take him to your vet tomorrow, it's not an emergency. this lump needs to be checked and analysed as there are many conditions and types of tumors that could look like that. take him to the vet, they will perform a fine needle aspiration on the growth and send it to the lab for analysis. when the result comes, the vet will advise what needs to be done according to the diagnosis.

At this point, there may not be much you can do other than monitor it closely and keep it clean and dry. Protect the lump from scratching or other trauma. Your normal vet may also be able to provide some guidance via telehealth. Make sure to have it checked out as soon as your veterinarian opens again. If the mass starts getting worse, call and see if any emergency clinics are still open. Also, it's likely there are still some normal veterinary clinics that are open and I recommend to call around and look. You need to make arrangements for an appointment ahead of time and follow the assigned protocols. I hope this helps.

I can't really tell from the picture what it is. If you dog isn't on a flea or tick preventative, that could be part of the issue. Skin infection, sebaceous cyst, or other masses would be possible, as well. I would wait and see what happens. You can get her started on a flea preventative, and use a medicated shampoo like Dechra MalAcetic Ultra Shampoo for mild skin infections.

It could be that Carlito had a cyst, and it burst from this inside causing it to become smaller. If he is eating and drinking normally, behaving normally, and using the toilet normally, then this can wait until Monday. If any of those things change, then I would have him seen by a vet right away.

A tick bite typically leaves a "granuloma." This is a reaction to the tick's saliva. It should resolve on its own in a a few days to a few weeks. Monitor for signs of infection, lameness, lethargy, swollen or painful joints or fever. Use a [tick preventive](https://www.petco.com/shop/en/petcostore/category/dog/dog-and-puppy-flea-and-tick) such as FrontLine, K9 Advantix, Bravecto, NexGard or a Seresto collar. Always check for [ticks on your dog](https://www.petcoach.co/article/6-places-ticks-hide-on-dogs) upon returning home for outdoors.