I was stung in the neck by something in Costa Rica last week. I had an allergic reaction and started getting hives all over my body. I took 2 Benadryl and gave myself an Epipen shot and it kept getting worse (I have an allergy to wasps and yellow jackets). Finally I was given 40 mg of Prednisone, and my symptoms went away. I continued with the prednisone for 2 more days, 20mg at a.m. and 20mg. at p.m. the first day, then just 20 mg. at a.m. the second day for a total of 100mg. over the 3 days. I started having jitteryness and discontinued on the 3rd day. Now, 11 days after the sting, I have developed a hivey rash around the sting area, and I am experiencing strong pain in my lower back running down my leg. The pain woke me up through the night.