I have one small observation that might have played a role in Anna's death. Anna checked into the Hardrock Hotel on Feb. 5th. Ok, now... The National Enquirer has an issue dated Feb. 5th. That means it is on the news stands and out there by that date. Inside the Enquirer that week, is an explosive center 2- page (30 & 31) that reads Anna Nicole's son MURDER - Howard K. Stern key figure in probe- insider says.
It details all about the 1 inch thick probe that the Bahama officials have with mounting evidence HKS is involved. Someone had to have given him drugs wile in the Bahamas.
Ok speculating here, but what if Anna had a copy of this magazine and confronted HKS. They got into a fight. (the bruise on her back) he did her in to shut her up? The ice was to reduce the swelling from the fight. Ok thinking outloud.. was the abscess on the same place as the bruise?
I think your train of thought about the ice being for the bruise, etc. is highly plausible. I don't see where there is any proof ANS ever had a fever. Did they even find a thermometer in her room?