I would say it is a rare thing called a cyst in which there is a liquid lump or bubble somewhere which gets bigger the more the animal eats or drinks. This happened to one of my hamsters. We put in a needle and tried to suck some out but it didn't help. If this is the case, take your guinea pig to a vet right away. The cyst should fell warm with liquid inside. Also, this could be a birth defect. When you got your guinea pig, I need to know, was the bump there, or did it appear later? If it was always there, it is probably a birth defect, like I mentioned earlier. But if the bump appeared later and looks like it is on the spine, his back may be injured. This could happen from a fall from an elevated object like a table or a chair. Also, your guinea pig's spine could be bent from spinning on a wheel. Wheels are not good for guinea pigs because they hurt and put strain on the backs of guinea pigs. This is coming from an 11 year old, but I know a lot about guinea pigs and hamsters.
Well, raccoons get this lump, called a debrah when it is kept in captivity. If you love it, you will set it free and the lump will go away.
Bruises mean that some capillaries broke, and they bled under the skin. The hard lump is most likely from the bleeding. As the bruise fades away, the lump should go away with it.
Take it to a vet.
It might be. Does the lump move around when you touch it, or is it fixed to the bone of the jaw? Regardless, you should get professional help from your dentist or your PCP right away.
sometimes it is but very rerely
A lump under one or both nipples is common in early puberty for both boys and girls. If you are not in puberty, a lump under one nipple deserves a checkup.
It is just a swelling of the tissue beneath the affected area...no worries! It will go away when you're healed.
It's unlikely that a change in food would directly cause a lump to develop on your guinea pig's side. Lumps can be caused by a variety of factors, including abscesses, tumors, or cysts. It's best to have a veterinarian examine the lump to determine the underlying cause and recommend appropriate treatment.
A lump on the back of your head that is itchy may be from an inset bite. If the lump does not go away, visit a doctor.
Did you ever figure out what it was? I just still remember you and was wondering if you were okay logged for the first time in three years.
The lump may not have to do with your breast cancer , if you have not bumped your head any where and the lump does not go away with should check the doctors immediately.
It is probably because you have hit your bruise and formed a lump there.