I've been doing allergy injections for years now. Although they have helped my stuffiness/runny nose, my eczema has gotten worse.

Anyway, I noticed you mentioned biking to your allergy shots. Be sure you talk to your allergist about this first. When I get my shots, I'm not supposed to exercise for 1 hour before and 2 hours after the injection. The exercise speeds up the absorption of the injection and increases the chances of a full-body reaction to the injection.

Take care.
TB