I have used charcoal for bee stings also. It works good to put this mixture into a pouch: cut from a baby diaper or chuck with medical tape around it, Pull out the stay dry lining because charcoal only keeps drawing if it is wet. Ground Flax seed works best but when my husband became allergic to flax seed I started using corn starch.
This also works on Brown Recluse Spider Bites, Snake Bites, Mosquito Bites, Infected Cuts of any kind and Ear Infections (Tape to the out side of the ear, pulls the infection out). I used this on my children it really works. Put it on at night and the next morning there was yellowish pus on the poultice.
I believe if people knew the benefits of Charcoal and how to use it many lives would be saved. No worries about gangrene.
I am very allergic to bee stings. I had gotten stung a few times during my childhood and teens, each time with more severe swelling. The last time I had gotten stung (stepped on a bee going barefoot), my leg swelled up like an elephant leg all the way to the thigh (the time before that it was just above the knee). So I knew it would be worse the next time, so I carried an Epi-pen around for a while until it expired. Then I carried nothing with me, but I knew if I got stung again esp. above the waist it would probably cut off my airway circulation. Well, lo and behold, about 20 years later I got stung again, right on my throat, so I yelled for my husband to call 911, thinking I was done for. Then a few seconds later I said, "Never mind! Hang up and help me mix up this charcoal!" So we took some powdered activated charcoal, mixed it with water, and applied it to the sting site. When the paramedics showed up a few minutes later (they had traced the call), we told them we were fine, since there was no swelling at all. I changed the charcoal poultice quite often during that first day, I don't remember exactly how often. Maybe every hour for a few hours. We also ground up some flax seed and mixed it with the charcoal and water. This makes it gelatinous and less runny. I kept the poultice on for about 3 days. Two days later I felt it itch and begin to swell, and then I realized the poultice had slipped off the sting site. So I knew I was still very allergic, and the charcoal had probably saved my life.