It might be. Actually there are lots of disease you can get from smoking.
gas.
Growing Pains perhaps depending upon your age.
PAIN UNDER RIB CAGE UPPER LEFT SIDE WITH SPASMS. VERY PAINFUL HARD TO GET UP AFTER LAYING down.
Costochondritis is a common inflammatory condition of the place where the rib and rib cartilage meet. Other lung and related conditions, such as pleuritis, can also cause inflammation in the chest and rib cage area.
Your solar plexus?
Could be a number of things and should be seen by a doctor. In my case it was from coughing due to smoking. Excessive coughing can cause pain under the rib cage from bruising.
gas.
Severe pain under the center of your rib cage can be an indicator of a couple of things. It could be heartburn, an ulcer, gall stones, or a simple stomach bug.
No smoking does not contribute to such pains. Dr. Sandoval.
Bedding can cause quite a mess unless you have a towel under the cage or high cage walls.
Ferret cage category might be under small mammals, small animals or exotic animals
Growing Pains perhaps depending upon your age.
I have FULL DEXTRA CARDIA What could cause a dull ache on the upper right side just below or right under the edge of the rib cage close to the surface. It was intense for a day and I had a sore back by evening the day it started it is now fading away on the 3rd day but still lingers by the ribs.
could be a hernia, i would go to the Dr. and get it checked out.
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.
If you line an iguana's cage with newspaper, the ink may rub off on it's skin, which could cause an illness of some sort.
Take your python to the vet IMMEDIATLY. She/he could have a very serious deadly infection.It's probably the things you have in the cage. Ask the vet for more.