Allergic to penicillin: the allergy thanks to penicillin can range from anaphylaxis to a light rash. Penicillin may be a group of antibiotics which is employed regularly. Meat allergies: an individual can suffer from the allergy thanks to meat like pork, poultry products, and beef. The symptoms of this allergy take a while to develop. Pollens: these are particles which are produced by the tree and therefore the grass. If these particles reach within the body through breathing then it's going to cause headache, sneezing, and irritation of the throat. Cosmetics: variety of cosmetic products like moisturiser, shampoo, and other face products can cause allergies . a number of the common symptoms includes dryness and swelling. Dust mites: it'd be very surprising for you to understand but dust mites are present in majority of the corners of the space . The carpets, curtains, and pillows are their house. Animals: one among the foremost common allergens which is understood round the world is that of protein which is being excreted by the animals. this will cause wheezing if an individual inhales it accidentally. Food allergy: an individual may additionally have food allergies. it's possible that an individual may need allergies to the dairy products like milk, cashew, eggs, nuts, etc. Insects: allergies are often triggered if an insect bites the person. The bite of the insect are often dangerous also. a number of the bites of the insects are often fatal also . Molds: these are fungi which may be easily found within the dark and damp places of the house. Allergy from molds can cause irritation, sneezing and eventually asthma. Perfume: an individual also can be allergic to fragrance of a perfume also . it's one among the foremost common allergen which will cause skin rashes. Cockroach: one among the foremost common causes of allergy are often thanks to cockroaches which are running around within the house. Breathing allergens released by cockroach can cause the event of asthma during a person.