Allergy: It occurs when the immune system responds to foreign elements known as allergens, such as pollen, dust mites, pet dander, mould spores, medicines, food or insect bites. Symptoms include itching, watery eyes, swelling, runny nose, itchy skin, and sneezing.
Pruritic skin disorders: Pruritus, also known as itching, is an irritating sensation that makes you want to scratch the skin. The causes of itching could be allergic reactions to food, pollen, insect bites or medicines, skin conditions like dry skin, psoriasis or eczema, irritating chemicals, cosmetics, certain disease conditions or parasites.