mild botulism symptoms :: Article Creator Contact Dermatitis: When Symptoms Start And Could End Contact dermatitis is characterized by inflammatory skin symptoms that appear after touching an irritating substance or an allergen. It can arise hours to days after contact with the trigger, resulting in itchiness, rashes, and blistering. Recovering from contact dermatitis can take several weeks, and the symptoms can change throughout the healing process. In addition to identifying and avoiding the trigger, a range of home methods, over-the-counter, and prescribed treatments can manage this condition. Eleganza / Getty Images Contact Dermatitis Triggers on Different Body Parts There are two types of contact dermatitis, determined by the trigger, as follows: Irritant contact dermatitis: The most common type, caused by contact with irritating substances and friction, not a true allergy to a substance. Allergic contact dermatitis: This typ...