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.
Nausea & Vomiting: Nausea is an uneasy feeling in which the person feels an urge to vomit, whereas vomiting is an uncontrollable reflex that expels the contents of the stomach through the mouth. Nausea and vomiting may occur separately or together. The common causes include motion sickness, emotional stress, indigestion, food poisoning, high fever or overeating.
Motion sickness: It is an illness caused due to motion during travelling by car, plane, boat, or train. The body’s sensory organs send mixed signals to the brain, causing dizziness, light-headedness, nausea or vomiting. Symptoms include nausea, vomiting, fatigue, uneasiness, dizziness, trouble maintaining balance or loss of balance.