Omega-3 Improves Your Pet Health

It’s a small little hard lump of something under the skin. It’s not moveable, but when I touch it, my cat doesn’t like it.
He’s is really good health, had a entire run-down at his vet checkup less than two months ago. As I always do, I had them test absolutely everything, bloodwork, checking kidneys and liver as well, the absolute works.
It’s not at any injection site, it’s surface is shiny. It’s about 1-2mm accross.
I know it’s nothing compared to some of the problems others are having, but does anyone know what to look for, warning signs like it growing? He seems uncomfortable when one touches it.
It’s about 3cm to the left of his spine two thirds down his back. (if you look from above).
It seems to be just one or two shades darker than the rest of the skin, and I get the idea there is something under the skin there, anyone have any ideas as to what it can be?

one with little maintenance, little health problems, barks less then other samll dogs.. etc.

I have a cat who I say is, oh 11 or 12 years old. She had some major health problems a few months back were we spent 1,000 dollars in different vet bills -.-
Anyways what does all this body language mean? When I come home and I wore my converse all day and when I take them off shes rubbing against them and sometimes just happily lays on them and chills out – it is really weird. Also when shes laying on my bed and I am on the computer I look at her and shes on her back with her fat gut all exposed and never really see cats lay like this usually they are all bundled up. Another thing is when I talk to her and tell her shes pretty or call her name which is Ellisah xD she looks at me squinty ever so much and her claws do the pattern of like a newborn kitten you know when they are nursing . . . the cla thingy lol. ALSO one last thing, when it’s bed time and sometimes I lay next to her she claws like that to my hair and like purrs loud in my ear lol, I can’t stand it for long though because of her claws. But what does all this mean? Thanks . . .

my cat always love to go roll in the dirt..etc.. but there is also a bee issue on the side of the house…
he just had a swollen eye but that healed but now he has a loss of hair and a soft bump under his chin w/ a red sore on top of it..w/ missing fur around it…
could it be a health problem?
a bee sting?
a bug bite or cut infected?
or idea…