It would depend alot on where it was, how quickly it arose, if it changed ,if it bothered them.
I've had pigs in the past with those firm ,smooth lumps in the saggy bits (under the chin, on the belly etc)
Not abscesses, but firm, like a grape.
Our GP1/GP2 had various little lumps, I mentioned it when they had a Rodentologist check up.
Belly lump was possible hernia.
GP1 had one like a Smartie on his belly sort of rounded but flat. Then one in his chins as he got older.
GP2 had various small lumps.
GP5 has one under her armpit (sort of further back, armpit always alarm me, I think lymph nodes) , we keep a check on it, it hasn't changed.
If it did, I'd take her.
If it was anywhere near her genitals, I'd take her to have it checked.
If it was hot or weeping fluid , I'd take her
If it was painful or got in her way day-to-day, I'd take her.
Apparently , bred from pigs are less prone to some tumours. Ours have been breeders before we got them.(Not a good enough reason to breed from them though
)
Rodenty types do seem prone to lumps.