Hi
Not fun. Cellulitis is a bacterial infection. A seroma is an accumulation of fluid (not necessarily infected) and usually around a wound site. It can build up quite a lot of fluid (a litre and a half was my personal best!) and there are few things the bad bugs in your system (which we all have) like better than a nice, warm, enclosed pool of nutrient rich fluid. So a seroma can become a seat of infection too. An ultrasound will probably clarify what the problem is, antibiotics may help, but keep an eye on it. You do not need a bad infection at this stage (or any stage for that matter).
If it is a seroma, they may drain the fluid (painless). If it persists, seriously ask for a referral to a therapist as massage can help disperse the fluid. It's a pain if it keeps forming, and the infection may return with it.
Good luck, don't despair, it's fixable, just a nuisance.
