Get a whiff of this: There’s about a 30 percent chance that staph bacteria are living inside your nose right at this moment.

                        a close up of a bowl: There are different types of staph infections and they show up in different ways. Here, doctors share the signs and symptoms of staph and MRSA infections to know.? Rodolfo Parulan Jr - Getty Images There are different types of staph infections and they show up in different ways. Here, doctors share the signs and symptoms of staph and MRSA infections to know.

                        That’s not necessarily something to fret over, though. Staphylococcus is a group of bacteria and there are more than 30 different types, according to the U.S. National Library of Medicine. They are known as “commensal” microorganisms because they’re friendly enough to live on our bodies without causing any problems, says Paul Fey, PhD, medical director of the University of Nebraska Medical Center’s department of pathology and microbiology. “You can find staph in your nose, on your skin, and sometimes in other mucus membranes like your anus,” he explains.

                        But while staph bacteria are courteous houseguests when confined to their normal quarters, they can cause infections and illness (most commonly caused by Staphylococcus aureus) if they gain access to areas of your body where they don’t belong. There are different types of staph infections, Dr. Fey says, and they show up in different ways.

                        “Staph infections most commonly develop when there is a break in the skin, giving the staph an entry point for infection,” explains Joshua Zeichner, MD, director of cosmetic and clinical research in dermatology at Mount Sinai Hospital in New York City. “This may occur after regular cuts and scrapes, nicks from shaving, or even open skin because of athlete’s foot.”

                        In addition to minor local infections, staph can also cause a serious immune system reaction to an infection known as sepsis, says Gary Goldenberg, MD, assistant clinical professor of dermatology at the Icahn School of Medicine at Mount Sinai Hospital. “People can die from a staph infection if it gets into the bloodstream or infects internal organs,” he says.

                        Not sure what to watch for? Here are the telltale signs of a staph infection you should know how to recognize.

                        1. Skin boils or pustules

                        Pus-filled or inflamed skin blemishes are by far the most common type of staph infection, Dr. Fey says.

                        “Let’s say you have a mosquito bite on your arm, and you have staph on your finger because you’ve been scratching or touching your nose,” he says. If you scratch your bug bite or some other place where your skin is broken, the staph bacteria on your finger can infect that wound and cause a big, red, painful, pus-filled blemish to form. You could also develop a rash-like cluster of raised blisters called impetigo, he says.

                        “It’s fairly common in the ER for people to come in thinking they have a large spider bite, when really they have a staph infection,” Dr. Fey says.

                        2. Skin infections

                        Staph is actually the most common cause of cellulitis, a common and potentially serious bacterial skin infection, Dr. Goldenberg says. “It can occur in completely healthy people or in those with weak immune systems,” he says.

                        Staph usually enters the skin through a cut or eczema patch and causes a local infection, leading to skin inflammation, Dr. Goldenberg explains. This can present as a warm, red, swollen area of skin that is tender or painful to the touch, most commonly on the lower legs, face, or arms.

                        While it may seem like no big deal, any skin condition that feels unusually painful or irritated should be evaluated by your doctor ASAP, as cellulitis can progress rapidly. “Deep infections like boils or infections of the legs should get immediate attention,” says Dr. Zeichner.

                        3. Food poisoning

                        When a food is exposed to staph, the bacteria multiply and produce toxins. It’s those toxins that can make you sick, and they can lead to symptoms like vomiting, diarrhea, and stomach pain, typically within 30 minutes to 8 hours after ingesting the contaminated food, according to the Centers for Disease Control and Prevention (CDC). However, it’s important to note that a fever is not typically something you’d experience from staph-related food poisoning, Dr. Fey says.

                        The best ways to avoid staph-related food poisoning is to make sure your food is handled at the right temperature, the CDC says. Hot foods should be kept at 140°F or hotter and cold foods at 40°F or colder. And, of course, it doesn’t hurt to wash your hands thoroughly for at least 20 seconds with soap before cooking or eating.

                        4. Fever and low blood pressure

                        In some cases—usually when someone’s exposed to staph in a hospital setting, like during surgery—staph bacteria can get into your bloodstream, Dr. Fey says.

                        This can cause a blood infection known as bacteremia, which can initially lead to a fever and low blood pressure. Once in your blood, this kind of staph infection can spread to your heart, bones, and other organs—and result in a number of serious or even deadly infections. Those include pneumonia, and also a type of bone infection called osteomyelitis, which could lead to swelling or warmth in the infected area, according to resources from the Mayo Clinic.

                        Bacteremia could also lead to an infection of the lining of your heart known as endocarditis. Symptoms—like fever, chills, night sweats, joint pain, pale skin, and weakness—can develop very slowly, suddenly, or even come and go, per the U.S. National Library of Medicine.

                        5. Toxic shock syndrome

                        When the toxins staph produces accumulate, they can cause a particular type of blood poisoning known as toxic shock syndrome (TSS). This could lead to a sudden fever, vomiting or diarrhea, muscles aches, headaches, and a rash resembling sunburn on your palms and the soles of your feet, research shows.

                        TSS is rare, though. The condition affects fewer than one in 100,000 people in the U.S., according to data from the CDC.

                        6. Sepsis

                        If a staph skin infection is left untreated, it can eventually enter the bloodstream and lead to sepsis, Dr. Goldenberg says, which is an intense immune system reaction to an infection that sends harmful inflammatory chemicals into the blood and other internal organs. This can block proper blood flow and potentially cause your organs to shut down, which can be fatal. Someone with sepsis might have one or more of the following symptoms, according to the CDC:

                        • A high heart rate
                        • Fever, shivering, or feeling very cold
                        • Confusion or disorientation
                        • Shortness of breath
                        • Extreme pain or discomfort
                        • Clammy or sweaty skin

                        ?? When to see your doctor about a staph infection

                        You’ve probably heard of MRSA—pronounced “mer-sa”—which stands for “methicillin-resistant Staphylococcus aureus,” Dr. Fey explains. As the name states, this is a type of staph that has developed resistance to certain antibiotic drugs, including a commonly used type called methicillin.

                        In most cases, MRSA infections manifest just the same as other types of staph infections—meaning they show up as skin boils or pustules, he says. But MRSA can also lead to some of the more serious skin and blood infections mentioned above. In those cases, MRSA’s drug resistance may make it tougher to treat.

                        That’s why “staph infections need to be treated immediately,” Dr. Goldenberg says, which could range anywhere from topical or oral antibiotics for superficial skin infections to IV antibiotics for more serious infections.

                        While anyone can develop a staph infection, those with weakened immune systems and diabetes are at a higher risk, Dr. Goldenberg says. People with eczema also tend to get more superficial staph infections, he says.

                        How to prevent a staph infection

                        Washing your hands thoroughly and often—especially when you’ll be handling food or touching a wound or broken skin—is the best way to prevent a staph infection, Dr. Fey says.

                        You should also try to keep broken skin (such as itchy rashes, cuts, and sores) away from gym equipment and other surfaces that may be harboring bacteria. “Make sure you tend to any open skin by cleaning the area, applying over-the-counter antibiotic ointment and then cover with a bandage to protect the area,” Dr. Zeichner says. “Do not share personal care products like razors, as they can spread bacteria, and avoid direct contact of the skin with someone who has crusts, scabs, or signs of an active infection themselves.”

                        If you have eczema, make sure it’s treated and see a doctor if you have any uncontrolled or infected-looking flare-ups, Dr. Goldenberg adds.

                        Unless you have an angry skin boil or blemish, spotting a staph infection is going to be difficult, since the symptoms can overlap with all sorts of health conditions, Dr. Fey says. When in doubt, see your doctor, who can give you a proper diagnosis and treatment plan.

                        Gallery: How You're Ruining Your Skin Without Even Realizing It (Provided by The Remedy)

                        a hand holding a banana: Youth might be wasted on the young, but often it’s wasted by the not-so-young. Chances are, you prematurely age yourself and needlessly irritate your skin in many ways every day without even realizing it. And dozens of those habits are easy, even effortless, to change. For example, did you know you could forestall wrinkling by just changing your pillowcase or skipping a straw at Starbucks?The Remedy asked some of the country’s top experts to reveal what they consider simple, quick and inexpensive routes to the fountain of youth (which you should ultimately drink from using a glass; read on to learn why).

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