A crew was called out to Silverwood Care Home in Flanderwell Lane, Rotherham, at 4am after a 91-year-old resident said the jewellery was causing her some distress.
Firefighters used specialist equipment to remove the gold band, much to the relief of the elderly lady.
Ben Illsley watch manager, said: "She had been in hospital for six weeks and had returned to the care home.
"The ring was causing her quite a lot of pain so we used a piece of equipment that puts a hooks behind the ring to get it off.
"We were there for about 30 minutes but we managed to remove it.
"She was quite relieved by the end of it."
He added that firefighters get such requests more often than you might think.
He said: "We probably get about five a year per station.
"Usually it is people coming to see us asking for help but obviously the lady in this case was in a care home so we were called out there."