My dog has a hard grey lump on her backside. Is a vet visit needed?

Diamond needs to be examined by the veterinarian today. This could be a cyst, an abscess or a necrotic tumor. It looks like it could be infected whatever the cause. If it is a cyst or tumor, it will need to be removed. If it is an abscess, it will need a drain. It probably does hurt. She needs an exam, possible diagnostics, medications to address and infection (if present) and pain. She also needs an elizabethan collar so she cannot lick the area. I hope they figure out the cause quickly.

Daisy sure is cute!! So sorry she is having this issue. That looks like an open wound that is oozing. The lump could be an abscess or cyst that has ruptured. I would not consider this an emergency but I would try to take her in for an exam during your vet's regular business hours. It is very hard for me to tell much without seeing her in person. Hope this helps. If you have more questions please feel free to post again! Best wishes.

Ouch that looks uncomfortable. That looks like a mass of some sort. Rocky needs to go to the vet to have that looked at and sampled. The vet may want to do a round of antibiotics first before sampling it because it looks like it could be infected. This isn't an emergency, but I would want him to get to the vet within the week.

Oh that is quite a large bump! I'm wondering if it could be a cyst, or if her anal sac is impacted. Because it's that large and I'm concerned it could rupture, I would have Frida seen by a vet immediately. Best of luck.

Ouch! Definitely something that should be checked out by your regular vet ASAP. Certain types of tumors such as mast cell tumors, hemangiomas, injuries, blood blisters, etc can all appear like this, and so it should be looked at and biopsied to see what is going on. Until you can get to your vet in the morning, keeping Berkeley from licking or chewing on the spot with an Elizabethan (cone) collar is best to reduce any further injury or irritation.

I definitely think this is something that should be seen by a vet, especially since Penny is licking at it. It means it's bothering her. I would take her into a vet today or tomorrow. Best of luck.

This does indeed look painful and ugly. There is no way to tell what caused this, however it is big enough and looks concerning enough to need to be seen by a vet. The vet will have these wounds cleaned after clipping all the hair around them, then disinfect them and probably apply some antibiotic ointment. Do not let Symphony lick the area as that may aggravate the condition. If she is very much in pain or if the wounds are bleeding, you should take her to a Pet ER tonight, otherwise you can probably wait until tomorrow to take her to a vet.