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… communicate. That can affect your relationships, emotional well-being, and work performance. For those who need them, hearing aids can help. These electronic devices are worn in or behind … to 29 million adults could benefit from hearing aids, yet only 1 in 4 of them has ever used one. An exam of your ears, nose, and throat might detect a physical reason why you’re not hearing …

… with herpes infection don’t even know it. They may not have symptoms or not notice them. For people who do have symptoms, a herpes infection may show up as one or more blisters. These can be on or near the mouth, eyes, genitals, or rectum. After the …

… The appendix is a finger-like pouch that branches off from your large intestine. No one is sure what it does or why it evolved. But when something goes wrong, it can be dangerous. … by the body’s protective response to injury or infection.] … of the appendix. This can happen for different reasons. Sometimes the tiny opening that leads from the appendix to the large …

… of DNA you inherit from your parents. They define features like your risk for certain diseases.] appear to play some role in who’s at risk. Symptoms may be mild and not … explains Dr. Christopher Earley, a nervous system specialist at Johns Hopkins University. One is the urgent need to move the legs. Second, leg discomfort is triggered by rest, like …

… of wholeness,” says Dr. Paul Marasco, a biomedical engineering researcher at Cleveland Clinic. One way to help a person feel their prosthetic hand is to move the remaining sensory nerves from … have to look at the bionic hand to know when it was open or closed, or when it was reaching for an object. “We fool their brains into believing that the prosthesis is actually part of their …

… us get headaches from time to time. Some are mild. Others cause throbbing pain. They can last for minutes or days. There are many different types of headaches. How you treat yours depends on … in “clusters” at the same time of day or night for weeks. Cluster headaches may strike one side of the head, often near one eye, with a sharp or burning pain. These headaches are more common in men and in smokers. In …

… most people don’t know they’re infected. Even if you have no symptoms, or only mild ones, you can still transmit the virus to others. Herpes simplex virus (HSV) comes in 2 forms. The most common, HSV-1, is best known for causing cold sores or fever blisters on the face, especially on the lips and mouth. But HSV-1 … usually affects the genitals, but can also infect the mouth. Both types of HSV can pass from one person to another through sexual or other skin-to-skin contact. “Once people are infected …

… It’s important to know the symptoms. Sepsis is a medical emergency. If you or your loved one has an infection that’s not getting better or is getting worse, get medical care immediately. Researchers are now looking for better ways to diagnose sepsis. One strategy is to use artificial intelligence to predict a …

… sleepy at night. Keeping your body’s daily cycles, or circadian rhythms, in sync is important for your health. “Circadian rhythms are big influencers in the body,” explains NIH’s Dr. Michael … Sesma, an expert in circadian biology. “They affect almost every part of your physiology in one way or another. Learning how the rhythm is generated is critical for understanding health.” … day, it sends signals to other brain regions to make [qtip:hormones|A substance produced in one part of the body to signal another part to react a certain way.] that will help keep you …

… against invading viruses, bacteria, and other microscopic threats.] … are at much higher risk for infections that could become serious (see the Wise Choices box). Diagnosing a fungal … Currently, there are few antifungal drugs available to treat serious infections. “And the ones that are available tend to have a lot of side effects,” Andes explains. This is because … they may be good starting points for creating new antifungal drugs. Andes’ team recently found one such compound in a marine animal called a sea squirt. They’ve tested the compound, called …