Check ingredient lists for the antibiotic, neomycin, a common allergen found in both prescription and non-prescription topical antibiotic creams, ointments, lotions, ear drops, and eye drops. Neomycin may also appear in combination with topical steroids, and other antibiotics such as triple antibiotic first aid creams. Treating cuts, abrasions, and rashes with over-the counter neomycin-containing creams can result in neomycin-induced dermatitis for those individuals with this sensitivity.
Two other common allergens are thimerosal, a mercury compound used in local antiseptics and as a preservative in some vaccines, and bacitracin, a topical antibiotic. You may want to look at the ingredient lists of any topical antibiotics that you use to see if either is present if you are experiencing allergic-type reactions.