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Lyme disease, transmitted by deer ticks, may not be detected early on. If left untreated, the infection can lead to Lyme arthritis, marked by joint swelling, often in the knee. Most cases respond to antibiotics, though some require additional treatment.
An aortic dissection, a tear in the body’s largest artery, typically causes sudden, severe pain in the chest, back, or abdomen. This uncommon condition is most likely to occur in people with a thoracic aortic aneurysm, a bulge in the section of the aorta closest to the heart.
Intermittent fasting, a dietary pattern that alternates between periods of eating and fasting, has become a popular weight-loss approach. A 2026 scientific analysis suggests it may not work as well for weight loss as some people have thought.
As of August 2026, sunscreens in the United States will be allowed to use an ingredient called bemotrizinol. It blocks both UVA and UVB rays and it doesn’t appear to be absorbed into the bloodstream, unlike many sunscreen chemicals.
Peptides are the building blocks of proteins that play key roles for health. But the benefits and risks of supplementing with injectable peptides, which are popular on social media, are largely unknown.
During a diverticulitis flare-up, it’s important to stay nourished and hydrated. Start with clear liquids, then progress to low-fiber soft foods before gradually reintroducing high-fiber foods. For long-term prevention, focus on a high-fiber diet and regular exercise.
Diagnosing hypothyroidism can be tricky because typical symptoms (such as fatigue and trouble losing weight) have many other possible causes. Some people treated for hypothyroidism may be able to safely stop treatment with close medical monitoring.
Using an AI algorithm on a coronary computed tomography angiogram can quantify the type and amount of plaque in the heart’s arteries. But whether that information can help prevent more heart attacks remains to be seen.
Cardiac amyloidosis is a rare heart condition that causes the walls of the heart to become thick, stiff, and unable to pump normally. Three FDA-approved medications for the most common form, ATTR-CM, slow disease progression and extend life.
Foods that contain mainly saturated fat, such as beef tallow and butter, are less heart-healthy than those that contain mainly unsaturated fats, including olive oil and seed oils such as canola oil and soybean oil.