How can you remove a ring from a swollen finger without cutting the ring?

Carefully. There are many ways to remove a ring from a swollen finger. Unfortunately, sometimes it must be cut off. Try this site for a few remedies. If it doesn't work, see your doctor.
Ring. Soak in soap and gently pull under warm water, if fails try olive oil instead of soap, if fails try thread wrapped around finger & under the ring then pull while rotating.