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Motion sickness is a condition that causes nausea, dizziness and other problems. It happens to people when they are on a boat, in a car, on a carnival ride or in other moving vehicles.

High Altitude Sickness (HAS) may happen while travelling to areas 2500 - 3000 meters above sea level

A migraine is a very painful type of headache. It usually begins slowly, worsens over minutes to hours and resolves slowly at the end of the attack. People who get migraines often describe the pain as dull, deep and steady which turns into a throbbing headache as it worsens. The headaches are usually worse on one side of the head.

Worm infestations happen when worms affect the intestines and other parts of the body. Examples of the different worms are roundworms, whipworms, hookworms, tapeworms and flukes.

A parasite is a living thing that lives on or in other organisms, called the host. It depends on its host to survive. The host provides food, a place to live, to grow and increase in numbers. Parasites come in different sizes, from tiny organisms to worms that can be seen with the naked eye.

A headache refers to pain at any part of the head. It may be on one or both sides of the head and may be a sharp, pounding pain or a dull ache. Headaches may last for less than an hour to a few days. The most common headaches are tension-type headache and cluster headache.

Hair growth happens in a cycle. Each strand of hair grows for 2 to 6 years, rests, and then falls out. New hair then starts to grow in its place. It is normal to lose 50 to 100 strands of hair a day. These are replaced by new hairs which grow back in the same follicles (part of the skin where hair grows from). Hair loss becomes a problem when new hair does not grow back or too much hair is lost. It usually starts slowly and may be patchy or affect the whole scalp. Hair loss can affect anyone - men, women or children.

Insect bites/stings are usually harmless if the person is not allergic to them. Bites/stings from bees, wasps, hornets and fire ants cause pain, while bites from mosquitoes, fleas and mites cause itch. Some insect bites may also spread diseases.