Ask the Doctor

With influenza virus, a new vaccine must be developed each year to adapt to the virus's changing structure.

Essential tremor is marked by involuntary shaking of one or more body parts, such as the hands, arms, legs, or head. Avoiding caffeine and stress and getting plenty of rest can be helpful. Several medications are available to ease the symptoms.

Spray-on sunscreens can be as effective as lotion-based sunscreens for protecting skin from harmful ultraviolet light. People using sunscreen sprays should make sure skin appears wet and shiny where they've sprayed and rub the product in before it dries.

Exercising barefoot can be done safely when walking on grass or a sandy beach, biking, or doing yoga or tai chi. But walking or running barefoot on pavement can pose numerous hazards to feet, including splinters or stress fractures.

Meatless burgers-which include plant-based meat alternatives like Beyond Burger and Impossible Burger and veggie burgers-are healthy replacements for traditional hamburgers. Those with the lowest amounts of saturated fat and sodium are the best options.

In robotic surgery, a surgeon controls robotic instruments that perform the operation, based on what the surgeon sees on a TV monitor. This type of surgery has many advantages: it involves small incisions, better views inside the body, and better range of motion than human hands. A research letter published in the May 2025 issue of JAMA Neurology described how robots controlled by a distant surgeon could reach in, grab, and remove blood clots stuck in a brain artery, reducing the damage from a stroke.

Doctors are optimistic that artificial intelligence (A.I.) will one day play a role in curing and preventing Alzheimer's disease. One example of A.I.'s application is its use in helping scientists learn how certain molecules might cause Alzheimer's.

Walking while wearing a weighted vest or backpack can help build muscle strength and bone density, improve the heart's pumping ability, expand lung capacity, and burn additional calories. People with neck or back pain should not wear a weighted vest.

Using hormone therapy, which involves taking estrogen and sometimes progesterone, doesn't stop or slow the approach of menopause. The arrival of menopause is determined by women's ovaries, not by the amount of these hormones in the body.

Earwax should be removed only if it causes problems with hearing, ringing in the ears, or an earache. To unblock the wax, people can use an over-the-counter ear-cleaning treatment to flush it out. If this is not successful, see your doctor.