My dog has a red bullseye spot and a rash. When should I see a vet?

Thank you for providing pictures of Achilles's belly! Yes, I would take him into the vet. It certainly isn't normal to have a rash on the belly, and it could be caused by a contact allergy, ringworm, or a skin infection. The vet can diagnose what is causing the rash so it can be treated. I would take him into the vet in the morning.

It’s hard to say from the photo. That could be an area where a tick bit Winston. It could also be some sort of puncture wound, spider bite or potentially a ringworm lesion. From the photo, the area looks swollen. Because of this I recommend to have him examined by the veterinarian with in the next 24 hours. A swollen tick bite or puncture wound could indicate the onset of an infection. There could also be a tick head or foreign object trapped in the skin. Ringworm generally does not swell but a deeper infection could. Make sure Winston does not lick the area and have him wear an Elizabethan collar. I hope this helps and best of luck. Please feel free to post any additional questions.

Oh no, poor Winston! His face looks so sad. It sounds like he may be having an allergic reaction, and the lumps are hives. You need to take him into a vet immediately for treatment, as allergic reactions can progress to swelling of the face and muzzle, and subsequent respiratory distress. Please take him into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website.

Thanks for using Petco Pet Education Center, formerly Petcoach! A skin lesion like you are describing can have multiple causes, such as a tick (or other insect) bite, or a fungal or bacterial infection, among others. If it does not resolve in 24-48 hours, spreads, worsens, she starts acting ill or you are worried, I would have it checked by your regular veterinarian to see what may be going on, and if any treatment is needed. Good luck!

The most common reason that we see red circular rashes in dogs are actually bacterial skin infection. Tick bites rarely cause red circular rashes in dogs (it's more common in people). Ringworm certainly can cause a circular rash, but they often aren't red in dogs. I would recommend having your vet examine Chance and determine what they think is going on. They may be able to tell by looking at it, or they may need to do some special skin tests like skin scrapings or skin cytology in order to determine the best treatment for Chance. I hope that was helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

Poor Teddy! It sounds like he is suffering from some severe allergies that is causing this persisting rash. I would take him into the vet for an exam. It sounds like he could use a strong medication to stop the rash, such as a steroid. I would take Teddy into the vet today or tomorrow during normal business hours.

That looks like a skin lesion to me, which could be from a tick bite. It could also be a ringworm lesion. Without seeing Dozer in person, I can't say for certain what is causing this mark. I recommend giving his vet a call today to make an appointment for him. The vet can diagnose what is causing the mark, and can prescribe a treatment for it. Best of luck.