It could be a growth, so you ought to see a doctor about it.
a penis
Any small animal is good to take back and forth to Dad's, then to Mom's. So i guess the answer is yes. But it will be hard to get the cage back and forth. You could try a hamster? :)
There are many different things that a hard boil type knot with no core on the lower part of the back could be. It could be infection.
You may have torn a small amount of muscle and this could be the result.
It means you are constipated and could use a laxative.
It can be hard to think about if it was a bad relationship it could even be painful.
Well you could but it would be extremely hard because of their small teets and you wouldn't get much considering how small they are.
could be anything from stress bumps but i don't think it sounds like it it may be fluid build up or a tumor call you doctor asap
...many things
There is a chance it could be genital warts caused by an HPV infection.
could be viral.....molloscum contagiosoum causes small hard blisters, usually described as pearly or filled with a waxy or cheesy substance. very common in children, or could be a herpes virus.. seek medical advice!
If the bump is very small it could well be an ingrown hair and it's not uncommon. However, if it feels larger you should see your doctor and be sure you don't have cysts growing in the nasal cavity.