I got an allergic reaction to using athlete's foot spray by getting tinactin (tolnaftate). What should I do?

Steroid creams. Clean the tinactin (tolnaftate) off. A steroid cream will help reduce the allergic reaction. Anti-histamines will decrease the itch and redness from the reaction.
Stop using the . Tinactin, clean it off, take oral benadryl (diphenhydramine). You can apply a topical steroid cream, though you are limited in strength without a prescription.
Cortisone cream. Clean the feet well with soap and water and then apply a cortisone cream.