Sodium

Table salt is a combination of two minerals - sodium and chloride Your body needs some sodium to work properly. It helps with the function of nerves and muscles. It also helps to keep the right balance of fluids in your body. Your kidneys control how much sodium is in your body. If you have too much and your kidneys can't get rid it, sodium builds up in your blood. This can lead to high blood pressure. High blood pressure can lead to other health problems.

Most people in the U.S. get more sodium in their diets than they need. A key to healthy eating is choosing foods low in sodium. The Dietary Guidelines recommend that most adults eat less than 2.3 grams per day. That equals about 1 teaspoon of table salt a day. Some people are more sensitive to the effects of salt than others and should eat less. This includes people who have high blood pressure, diabetes, or kidney problems, or are African American or over age 50. Reading food labels can help you see how much sodium is in prepared foods.

NIH: National Heart, Lung, and Blood Institute

Staphylococcal Infections

What are Staphylococcal (staph) infections?

Staphylococcus (staph) is a group of bacteria. There are more than 30 types. A type called Staphylococcus aureus causes most infections.

Staph bacteria can cause many different types of infections, including:

• Skin infections, which are the most common types of staph infections.
• Bacteremia, an infection of the bloodstream. This can lead to sepsis, a very serious immune response to infection.
• Bone infections.
• Endocarditis, an infection of the inner lining of the heart chambers and valves.
• Food poisoning.
• Pneumonia.
• Toxic shock syndrome (TSS), a life-threatening condition caused by toxins from certain types of bacteria.

Some people carry staph bacteria on their skin or in their noses, but they do not get an infection. But if they get a cut or wound, the bacteria can enter the body and cause an infection.

Staph bacteria can spread from person to person. They can also spread on objects, such as towels, clothing, door handles, athletic equipment, and remotes. If you have staph and do not handle food properly when you are preparing it, you can also spread staph to others.

Anyone can develop a staph infection, but certain people are more likely to get one, including those who:

• Have a chronic condition such as diabetes, cancer, vascular disease, eczema, and lung disease
• Have a weakened immune system, such as from HIV, medicines to prevent organ rejection, or chemotherapy
• Had surgery
• Are in the hospital
• Use a catheter, breathing tube, or feeding tube
• Have an implanted device, such as a pacemaker or artificial joint or heart valve
• Have burns, especially if they are deep or cover a large area of the body
• Are on dialysis
• Inject illegal drugs
• Do contact sports, since you may have skin-to-skin contact with others or share equipment

The symptoms of a staph infection depend on the type of infection:

• Skin infections can look like pimples or boils. They may be red, swollen, and painful. Sometimes there is pus or other drainage. They can turn into impetigo, which turns into a crust on the skin, or cellulitis, a swollen, red area of skin that feels hot.
• Bone infections can cause pain, swelling, warmth, and redness in the infected area. You may also have chills and a fever.
• Endocarditis causes some flu-like symptoms: fever, chills, and fatigue. It also causes symptoms such as rapid heartbeat, shortness of breath, and fluid buildup in your arms or legs.
• Food poisoning typically causes nausea and vomiting, diarrhea, and fever. If you lose too many fluids, you may also become dehydrated.
• Pneumonia symptoms include a high fever, chills, and cough that doesn't get better. You may also have chest pain and shortness of breath.
• Toxic shock syndrome (TSS) causes high fever, sudden low blood pressure, vomiting, diarrhea, and confusion. You may have a sunburn-like rash somewhere on your body. TSS can lead to organ failure.

Your health care provider will do a physical exam and ask about your symptoms. Often, providers can tell if you have a staph skin infection by looking at it. To check for other types of staph infections, providers may do a culture, with a skin scraping, tissue sample, stool sample, or throat or nasal swabs. There may be other tests, such as imaging tests, depending on the type of infection.

Treatment for staph infections is antibiotics. Depending on the type of infection, the antibiotics might be a cream, ointment, medicines (to swallow), or intravenous (IV) medicine. If you have an infected wound, your provider might drain it. Sometimes you may need surgery for bone infections.

Some staph infections, such as MRSA (methicillin-resistant Staphylococcus aureus), are resistant to many antibiotics. There are still certain antibiotics that can treat these infections.

Certain steps can help to prevent staph infections:

• Use good hygiene, including washing your hands often.
• Don't share towels, sheets, or clothing with someone who has a staph infection.
• It's best not to share athletic equipment. If you do need to share, make sure that it is properly cleaned and dried before you use it.
• Practice food safety, including not preparing food for others when you have a staph infection.
• If you have a cut or wound, keep it covered.

Stem Cells

Stem cells are cells with the potential to develop into many different types of cells in the body. They serve as a repair system for the body. There are two main types of stem cells: embryonic stem cells and adult stem cells.

Stem cells are different from other cells in the body in three ways:

• They can divide and renew themselves over a long time
• They are unspecialized, so they cannot do specific functions in the body
• They have the potential to become specialized cells, such as muscle cells, blood cells, and brain cells

Doctors and scientists are excited about stem cells because they could help in many different areas of health and medical research. Studying stem cells may help explain how serious conditions such as birth defects and cancer come about. Stem cells may one day be used to make cells and tissues for therapy of many diseases. Examples include Parkinson's disease, Alzheimer's disease, spinal cord injury, heart disease, diabetes, and arthritis.

NIH: National Institutes of Health

Stillbirth

What is a stillbirth?

If you lose a fetus at or after the 20th week of pregnancy, it's called a stillbirth. A stillbirth can occur before or during delivery and may be considered as:

• Early. The loss of a fetus between 20 and 27 weeks of pregnancy.
• Late. The loss of a fetus between 28 and 36 weeks of pregnancy.
• Term. The loss of a fetus at 37 or more weeks of pregnancy.

Stillbirth can happen in any pregnancy. Some factors may increase the chance that one can occur. Risk factors can include if you:

• Are age 35 years or older
• Are of low socioeconomic status
• Smoke during pregnancy
• Have certain medical conditions, such as diabetes or high blood pressure
• Are a non-Hispanic Black woman
• Previously had a stillbirth
• Are pregnant with more than one baby (twins or triplets)

In many cases, the cause remains unknown. Some causes may be preventable, but most are not.

Causes for a stillbirth may include:

Before delivery, the only way to diagnose a stillbirth is to check if the fetus's heart is beating. Your health care provider may use an ultrasound to look for the fetal heartbeat.

During your pregnancy, your provider may recommend keeping track of fetal movements. However, if you don't notice movement, it doesn't always mean a stillbirth occurred. Sometimes, especially if it's your first pregnancy, it might be difficult to notice movement. If you're pregnant and something seems unusual or is worrying you, talk to your provider.

After labor and delivery, your provider will check the baby for signs of life. These can include breathing, heartbeat, voluntary movements, and pulsations in the umbilical cord. If one or more signs of life are not present, then life-saving measures are taken. If these measures are unsuccessful, a stillbirth may be diagnosed.

Care after a stillbirth depends on when it occurs. If it happens before delivery, your provider may induce (start) labor or use surgery to deliver the fetus (cesarean delivery). If it happens during labor and delivery, the placenta will still need to be removed or delivered.

No matter when it occurs, losing a pregnancy can be difficult. Counseling may help you cope with your grief. Later, if you decide to try to get pregnant again, work closely with your provider to understand any risks. Many women who have a stillbirth go on to have healthy babies.

NIH: National Institute of Child Health and Human Development

Stress

What is stress?

Stress is how your brain and body respond to a challenge or demand. When you are stressed, your body releases certain hormones. Hormones are chemicals that travel in your bloodstream and control how different parts of your body work. The hormones that are released when you are stressed make you alert and ready to act. They can raise your blood pressure, heart rate, and blood glucose (blood sugar) levels. This response is sometimes called a "fight or flight" response.

Everyone gets stressed from time to time. There are different types of stress. It can be short-term or long-term. It can be caused by something that happens once or something that keeps happening.

Not all stress is bad. In fact, it can help you survive in a dangerous situation. For example, one kind of stress is the jolt you may feel when a car pulls out in front of you while you are driving. This jolt of hormones helps you quickly hit the brakes to avoid an accident. A little short-term stress can sometimes be helpful. For example, the stress of having a deadline for school or your job may push you to get your work done on time. Once you finish it, that stress goes away.

But stress that lasts a long time can harm your health.

Long-term stress, or chronic stress, lasts for weeks, months, or longer. As you go about your life, your body is acting as if you're being threatened.

Causes of long-term stress include:

• Routine stress from the demands of work, school, family needs, money problems, and other daily pressures that don't stop.
• Stress from sudden, difficult changes in your life, such as divorce, illness, losing your job, or other unhappy life events that often have a long impact.
• Traumatic stress, which may happen when you're in danger of serious harm or death. Examples include being in a bad accident, a war, a flood, earthquake, or other frightening event. This type of stress can cause a long-lasting problem called post-traumatic stress disorder (PTSD).

People respond to stress in different ways. If you're stressed for a long time you may notice that you are:

• Getting sick more often than usual because stress weakens your body's ability to fight germs
• Having stomach problems or trouble digesting food
• Having trouble sleeping
• Having headaches
• Feeling sad, angry, or easily upset

When stress keeps going, your body acts as if you're always in danger. That's a lot of strain that may play a part in developing serious health problems, including:

• Depression
• Anxiety
• Heart disease
• High blood pressure
• Diabetes

It's possible to get used to the symptoms of stress and not even realize there's a problem. So when there's a lot of stress in your life, it's important to pay attention to how it affects you so you can do something about it.

Simple things that improve your mental health may be helpful in managing long-term stress, such as:

• Get regular exercise. A 30-minute daily walk can help you feel better and help keep your immune system strong, so you don't get sick.
• Try relaxing activities. You could look for an app or wellness program that uses breathing, meditation, or muscle relaxation exercises.
• Get enough sleep every night.
• Avoid too much caffeine.
• Decide what you need to do now and what can wait. And focus on what you got done each day, not on what you weren't able to do.
• Ask your family or friends for support.

Get help if you're having severe symptoms for 2 weeks or more, including:

• Trouble sleeping
• Changes in your eating that cause unwanted changes in your weight
• Troubles getting out of bed because of your mood
• Difficulty focusing your thoughts
• Losing interest in things you usually enjoy
• Not being able to do your usual daily activities

Always get help right away if stress is causing you to:

• Have thoughts of suicide
• Feel you can't cope
• Use drugs or alcohol more often than usual

Your health care provider may refer you to a mental health professional such as a psychologist or social worker.

NIH: National Institute of Mental Health