It sounds as if your husband is having an allergic reaction to the sting. Swelling is one of the body's defense mechanisms to protect itself. Sometimes it just has to run its course. Baking soda, mixed with a little water, may help. He may also want to take extra Vitamin D, which is known to be a natural steroid.
How long does it take for swelling to go down after a bee sting? My husband got stung two days ago in his hand and it's still extremely swollen.
Once I had a bee sting. It was on my elbow. It swelled for a few hours, then went back down. If your husband is having problems, he might be having some kind of Allergic Reaction! Now, here's a little Native American remedy for bee stings. Apply FRESH MUD or an onion to the bee sting.