If she's getting heat and swelling, you might want to consider a few other things. Keeping her stalled prevents the natural movement she needs to keep the circulation going in her legs. I really felt bad for Dancer when she had an abcess - but the farrier said to leave her alone and let her deal. She dealt better than I did.
Also - you might visit with your vet to see if a round of antibiotics may be in order. I don't like using them unless it's necessary, but in this case, it may speed up the healing and/or prevent the spread of infection. Your vet can advise you on that over the phone.
You also need to figure out what is causing the abcesses in the first place. Are they the result of stone bruises? (that was Dancer's issue) If your horse's hoof is too soft due to the possible
over use of hoof dressings - your horse is more likeley to bruise easily. Dancer's feet were horrid when we first got her. She looked like she had four bells at the end of her legs. It took the farrier over a year to get them looking normal and toughened up.
Is her stall bedding retaining too much moisture? It really needs to be kept uber dry. Has it been raining/snowing in your area? If she's spending time in muddy areas - that could be a contributor to soft feet. Are you feeding a sweet feed? Somewhere I read (can't remember where) that sweet feeds and too much grain can contribute to soft hooves. That's why our horses are fed forage based feeds rather than grain based feeds. For the most part, anyway. They do get a little grain based feed (not a sweet feed) in the winter (they are pastured 24/7 and it can get cold here in Oklahoma).
I know I'm not much help. I generally don't go running to a vet for every little oddity (I'm more likely to call our farrier - even for a cough). I really believe that less is more - and our horses heal/recover in spite of all we do for them rather than because of what we do for them.