Caffeine is a chemical substance found in nature in such plants as coffee beans, tea leaves and kola nuts. It can also be artificially created and is sometimes added to food products, including many sodas.

When you feel dizzy and it seems as if the room is spinning, you may be undergoing a bout of vertigo. Vertigo is a symptom of an underlying condition that could range from an inner ear disorder to dehydration or a sudden drop in your blood pressure. Vertigo is a common experience that increases with age.

Strep throat, medically referred to as group A streptococcal pharyngitis, is the most common of the acute bacterial throat infections. Strep throat should be treated with an antibiotic. While garlic is said to have antibiotic properties, it's not indicated as a form of treatment for the bacterial infection.

If you love spicy food, you're probably well aware that your nose runs and your eyes water when you eat it. In fact, you may eat spicy food when your sinuses are congested in the hopes of finding some relief. Some spicy foods can help you clear a stuffy nose.

Ear infections happen when fluid builds up inside the ear, giving bacteria or viruses a place to grow. Ear pain and fever can result. Although the National Institutes of Health says most ear infections resolve without causing additional problems, sometimes ear infections cause dangers beyond their immediate symptoms.

Allergies are known for their reactions in the body such as sneezing, coughing and asthma-like symptoms. A less common symptom associated with allergies is trouble swallowing.

Swimmer’s ear is a term used to describe outer ear or ear canal discomfort caused by infection, irritation or inflammation. It is formally known as otitis externa. If you get treatment for this disorder, you can usually resolve your symptoms in a matter of days.

Tonsils refer to the paired tissues that are located toward the back of the throat. These tissues contain lymphocytes, cells needed to fight infection.

Ear infections, also known as otitis media, are extremely common among children. The National Institute on Deafness and Other Communication Disorders states that about 75 percent of children develop at least one ear infection by the age of 3.

According to the American Academy of Otolaryngology, the nose contains a number of small blood vessels or arterioles, which can be easily broken and result in frequent nosebleeds.

Nasal saline rinse, also known as nasal or sinus irrigation, is commonly recommended to manage the symptoms of sinusitis -- the swelling and inflammation of the sinus tissues. Sinusitis can be related to cold symptoms, allergies or other conditions which cause the nasal passages to become blocked and filled with fluid.

A sore throat may be caused by bacteria, a virus, breathing through the mouth or a variety of irritants. If an illness is causing the sore throat, the glands that are located near the throat or your tonsils may be swollen as well, causing discomfort and difficulty swallowing.