Can contact dermatitis turn into chronic eczmea?

Possibly: If you are exposed to an allergen that is causing a reaction in the skin (eg. Nickel in earrrings), removal of the offending allergen will prevent the rash from recurring. Topical hydrocortizone or other steroids are effective for treating the dermatitis. However, if you continue to expose your skin to a known allergy trigger, the rash will become "chronic" (i.e. Failure to stop wearing nickel).