Skin itching for no apparent reason may be due to dry skin, according to Everyday Health. As skin loses moisture, it begins to feel tight, although no rash appears. Irritant contact dermatitis, the skin's instant or gradual reaction to a particular substance, can cause itchy skin patches without other symptoms.
Individuals can soothe and avoid itchy dry skin by applying a rich protective skin moisturizer to damp skin and refraining from using hot water and harsh cleansers, notes Everyday Health. Applying a corticosteroid to the skin helps minimize the itching. Dyes, fragrances, nickel and latex frequently cause contact dermatitis. Once people discover which substances cause their skin to itch, they can take proactive measures to avoid future contact, such as reading product labels.