could be a hernia, i would go to the Dr. and get it checked out.
maybe, depends
it could be a calcium deposit...
it is a good reason to take him to the vet
Growing Pains perhaps depending upon your age.
The possible cause for a hard elongated lump on the lower back rib cage is infection. It can also be caused by shingles.
stomach
The kidneys, liver and pancreas are under the right rib cage. The spleen and gallbladder are also under the right rib cage.
Yes, that is the top of your rib cage.
Pain under the rib cage is usually a cramp from exercising. If the pain does not subside, you may need to visit a doctor.
Go to the doctor!
Feeling a tugging sensation under your rib cage can be a sign of Lyme disease. It could also be something minor like a muscle spasm.
your lungson the right side your liveron the left, your kidney and stomachand sorta in the middle at the end of the rib cage is Duodenum (beginning): beginning of the small intestine.