Can deodorant get absorbed into the bloodstream? Can you be allergic from it?

Contact dermatitis. Localized allergic contact dermatitis is common with deodorants but does not cause systemic symptoms through absorption. Other common contact allergens include metals, glues, plastics, rubber, fragrances, topical antibiotics, preservatives, and chemicals. Avoidance is mainstay of treatment along with topical steroid creams. See an Allergist if you are concerned. Diagnosed by allergen patch testing.