Health

A:

Putting in contact lenses is an easy task that millions of people accomplish every morning. To start, you should wash your hands, rinse the lenses with contact solution, then hold your eyelids open that you can insert one lens into each eye. After the lenses are inserted, blink a few times to keep the lenses in focus.

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    • What causes cold sores?

      Q: What causes cold sores?

      A: The Mayo clinic states that cold sores are caused by the herpes simplex virus. This virus spreads through skin-to-skin contact, such as kissing and oral sex, as well as by sharing razors, eating utensils or towels. Once an individual has had one outbreak, the virus lies dormant in the nerve cells of the skin of the mouth, making future outbreaks likely.
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    • Why do my knees hurt when I bend them?

      Q: Why do my knees hurt when I bend them?

      A: WebMD explains that pain that occurs when bending the knees is a common symptom of bursitis, a condition in which the sac of fluid that protects the knee joints becomes inflamed and irritated due to repeated bending, injury or overuse. Bursitis that is caused by kneeling is often referred to as "housemaid's knee" or "preacher's knee."
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    • How is water lost from the body?

      Q: How is water lost from the body?

      A: Water is lost from the body when a person urinates, defecates, sweats and breathes, according to the Centers for Disease Control and Prevention, or CDC. The average adult loses two to three liters of water every day, with one to two liters lost as urine, 100 to 200 milliliters lost as feces, 300 to 500 milliliters lost through breath and about one-half lifter lost through sweat, according to TheNutritionDr.
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    • Is lupus deadly?

      Q: Is lupus deadly?

      A: According to Johns Hopkins Medicine, lupus is potentially fatal although it's usually limited to affecting a person's quality of life. Lupus is an auto-immune disorder characterized by its preference to attack the body's joints and connective tissues. Organs, such as the brain, kidneys and heart, are also targets.
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    • What is considered morbidly obese?

      Q: What is considered morbidly obese?

      A: According to the University of Rochester Medical Center, morbid obesity is when a person has a body mass index of 40 or higher or is 100 pounds or more over ideal weight. For those with weight-related conditions, a body mass index of 35 or higher is morbidly obese.
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    • How long can HIV survive outside the human body?

      Q: How long can HIV survive outside the human body?

      A: HIV is capable of surviving outside the human body for a period of several weeks in certain conditions, according to NAM AIDSmap. The body fluid in question and the quantity of the virus contained in the fluid affect the survival period, as does temperature and acidity.
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    • How long does a toothache last?

      Q: How long does a toothache last?

      A: A toothache can cause severe pain indefinitely if it is not treated, according to the National Health Service of Britain. A toothache typically is caused by tooth decay and may progress to a dental abscess without treatment.
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    • Can a tooth infection make me sick?

      Q: Can a tooth infection make me sick?

      A: According to MedlinePlus, a tooth infection can make you sick. Such an infection can result in pus and swelling within the tooth and can spread, causing pain and destroying tissue. In addition to a severe toothache, other symptoms include fever, swollen neck glands and swelling of the upper or lower jaw. If an abscess goes untreated, it can lead to tooth loss, sepsis and life-threatening complications including endocarditis, pneumonia or brain abscess.
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    • Can you use a regular rubber band to close a gap between your teeth?

      Q: Can you use a regular rubber band to close a gap between your teeth?

      A: No. Attempting to close a teeth gap - also known as a dyastema - with a rubber band may lead to a temporary fix, but could also cause many eventual dental problems.
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    • What causes a wisdom tooth infection?

      Q: What causes a wisdom tooth infection?

      A: According to WebMD, pericoronitis occurs when the wisdom tooth partially erupts through the gums, allowing bacteria to enter the cavity and cause an infection. The high risk of wisdom tooth infection, or pericoronitis, may be one of the major reasons your dentist advises you to get them pulled.
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    • Is fluoride bad for you when used on a daily basis?

      Q: Is fluoride bad for you when used on a daily basis?

      A: According to American Dental Association, children 8 years old and younger are at risk of developing dental fluorisis if too much fluoride is ingested. Dental fluorisis is a condition that causes white spots that eventually turn brown in unerupted and developing teeth.
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    • Why does my tooth hurt when I drink something cold?

      Q: Why does my tooth hurt when I drink something cold?

      A: According to WebMD, tooth pain that occurs when ingesting cold beverages is referred to as tooth sensitivity, which occurs when tooth dentin is exposed. Exposed dentin is caused by gum recession, tooth grinding, over-aggressive brushing and acidic beverages.
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    • What is a bone scan?

      Q: What is a bone scan?

      A: Mayo Clinic defines a bone scan as a nuclear imaging test that is used to diagnose and monitor multiple types of bone disease. Doctors typically order bone scans if a patient has a bone injury or abnormality that can't be detected on a standard X-ray. The scans can also be used to determine if cancer that started in a different part of the body has spread to the bones.
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    • How does the life support machine work?

      Q: How does the life support machine work?

      A: According to the Intensive Care Coordination and Monitoring Unit of New South Wales, ventilators, also called life support machines or breathing machines, work by supporting patients to breathe or by completely taking over the function of breathing for patients. A breathing tube inserted into the patient’s windpipe connects the ventilator to the patient.
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    • What is the purpose of an MRI?

      Q: What is the purpose of an MRI?

      A: The Encyclopedia of Children’s Health states that the purpose of an MRI, which stands for magnetic resonance imaging, is to generate images of the body to assist doctors in diagnosing diseases or conditions and evaluating injuries. Additionally, the National Health Service explains that the results of an MRI scan are useful in planning treatments and assessing the effectiveness of a previous treatment.
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    • What is the difference between aseptic and sterile?

      Q: What is the difference between aseptic and sterile?

      A: According to the Wound, Ostomy and Continence Nurses Society, sterile is the absence of and continued protection against all microorganisms, while aseptic refers to protections against pathogenic microorganisms. These two techniques, while similar in purpose, differ in severity and diligence. Sterile is the more thorough of the two types.
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    • How can you check your blood pressure at home?

      Q: How can you check your blood pressure at home?

      A: To check blood pressure at home, roll up one sleeve, sit down for a few minutes and place the cuff of a heart monitor around the upper arm. Inflate the cuff until it reads 30 points above the expected systolic pressure and look at the pressure reading on the screen or dial. It is a good idea to take multiple readings and record each reading with the time and date, according to the American Heart Association.
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    • What is a stereoscope used for?

      Q: What is a stereoscope used for?

      A: A stereoscope is a tool used for viewing images three-dimensionally. It has two removable eyepieces so that both eyes can be used to view an object at the same time. A stereoscope is used in various fields, such as police work, education, archeology, biology, government services, health and medical research.
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