What does the term "hot" gallbladder mean? Hubby was diagnosis with it, drs. @ 1st sugg surgery but then prescription change his diet and exercise?

Acutely inflamed. GB. When acute infections sets in gall bladder and surrounding tissues, swell up, more blood rushes to area to contain, feels warm & red compared to so rounding tissue ( hot ) , some times body succeeds as in your husband case, then will not need emergency surgery.
Don't know. If the gall bladder is hot that generally means acute cholecystitis. That generally means one needs surgery to remove the gall bladder. Diet changes cld be recommended. Exercise ?