Questions about abscesses
So, Pecan (almost seven months old female shorthair dilute calico) has a lump. I do not like lumps. I am a lump-checker like crazy- if I find any kind of abnormality in my kitty's sleek physiques I check every day and try to part the fur to see if it's a surface thing or an internal thing.
Pecan's lump was about the size of a nickel coin, not terribly swollen or protruding but firm and large enough that I would feel it whenever I touched that part of her body. At first I thought it was one of her teats, because it's in an armpit-ish area. I determined it wasn't, it was more or less on the connective stretchy skin between the arm and underarm. She's had it for some time now and I've been checking it to make sure it isn't getting any bigger (it's very hard to get her to hold still long enough to part the fur and check the skin).
Today after chatting with my great grandparents about it, I went to check and it felt much smaller, but also rather crusty (very close to the skin though, so it was difficult to see.)
I'm beginning to suspect that she may have had an abscess that has begun to drain itself. If it is, and it continues to drain itself, should I simply leave it for now and keep a close eye on it? I should note she seems to have an impeccable immune system and speedy recovery rate. She was spayed last month on the 21st and the external incision is already fused shut naturally and she shows no signs of discomfort or sensitivity to the area. The lump, however, seems to not bother her unless it's poked at too much. I would like to get a better look at it, perhaps clean the crust with some warm water and a tissue if she'll let me, but at this rate it's very hard because of the squirmyness. She's a VERY lively kitten that moves faster than any cat I've seen and constantly IS on the move when she isn't napping, going potty or stopping for refreshments.
I read that there are some tell-tale symptoms of abscesses, but she isn't really acting any differently. She isn't showing lethargy, she isn't limping (it's in a location that might cause discomfort moving her forelimb), it doesn't seem red from what I have been able to glimpse, and I haven't (personally) seen any discharge or pus (fresh), or noticed an odor.
I do have two other cats and Pecan plays very rough with them (they don't consider it playing, I don't think- they make a lot of scary noises while trying to stay away from her) and I'm wondering if one of them may have bit her and caused it. They're both sixteen year old+ cats who don't have the best dental health (it's so expensive where I live to get their teeth cleaned...) so I feel like it IS a possibility, since bites are often the cause of it.
Have your cats gotten abscesses? What were they like? Have you ever dealt with one like what I'm describing, and do you think what she has might be an abscess, or something else?