Knees Archive

Ask the doctors

Q. I was worried about drying my nails with a lamp or light box at the nail salon because of the potential risk of cancer from the ultraviolet radiation, but my salon recently switched to LED lamps. Are they safer?

A. The light boxes used to cure polish during gel manicures, and to dry traditional nail polish, have raised some concern because — like tanning beds — they emit ultraviolet A (UVA) radiation, which is associated with a higher cancer risk. A 2014 study in JAMA Dermatology found that the level of UVA exposure associated with a gel manicure every two weeks probably isn't high enough to increase the risk of skin cancer significantly, but you are wise to be aware of the issue.

Ask the doctors

Q. I'm in my early 50s and am considering a knee replacement for severe arthritis. I've heard that doctors typically encourage people to wait until after age 60 to perform this procedure. Should I wait to have the surgery?

A. Doctors do sometimes recommend that people under age 60 wait to undergo a knee replacement procedure, because these artificial joints typically last only about 15 to 20 years. If someone younger gets the procedure, it's likely that the joint will need to be replaced again down the line. That said, the decision to have a joint replacement really depends more on your individual circumstances, such as how much pain you have, whether the problem is causing you significant disability, and your overall health, not just how old you are. Some people can safely wait until they are 60 to undergo the procedure without a problem. For others, waiting too long to have the knee replaced might not be advised. For example, if the knee joint deteriorates too much, that may make the surgery to replace it more challenging. Over all, most people (80% to 90%) who do opt for a knee replacement are happy with the results of the procedure, but it's best to discuss the pros and cons with your doctor.

Treadmills and related fitness equipment can make aerobic workouts more convenient. Which type is best for you?

Even if you enjoy exercising outdoors, there are times when it's too cold, too hot, or otherwise uncomfortable or impractical to walk, jog, or cycle outside. And like many people, perhaps you've let your gym membership lapse. So how do you make sure you're getting an aerobic, heart-protecting workout most days of the week?

Maybe it's time to invest in a home exercise machine, such as a treadmill or elliptical machine. Not only can you exercise in the privacy of your home, you can also easily break up your workout into 10- to 15-minute stints throughout the day, whenever it's convenient for you. Current guidelines recommend getting at least 2.5 hours of heart rate–elevating (aerobic) exercise each week.

Ask the doctors

Q. I eat a lot of shellfish and recently developed gout in my knee. Did my diet cause the condition?

A. As you probably know, gout is a painful form of arthritis that occurs when high levels of a waste product called uric acid build up in the body. It can settle into joints, where it forms sharp crystals that can trigger inflammation, redness, and pain. Your diet may have aggravated the condition, but didn't cause it.

An ailing knee or a hip can make life miserable. Even if your doctor recommends it be replaced, you need to carefully weigh the risks and benefits before agreeing to this major surgery and understand that it will require significant rehabilitation to get back on your feet.

The most important factor in choosing to have a knee or hip replaced is how much it hurts and how much it is affecting your life. Here are six signals that it's time to have a knee or hip replaced:

The first line of treatment for many knee and hip problems includes taking over-the-counter pain medications. Acetaminophen and non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen are the most common pain medication options. However, these pain medications have a variety of side effects, so it's important to discuss your personal health risks with your doctor when considering long-term use for chronic conditions such as osteoarthritis.

Acetaminophen (Tylenol and other brands) is usually effective for mild pain and is easy on the stomach. However, it is toxic to the liver at high doses. The recommended maximum per day is generally set at 4 grams (4,000 milligrams), which is the equivalent of eight extra-strength Tylenol tablets. But that dosage can still cause liver problems for some people. To be safe, aim for 3,000 milligrams or less, and be cautious of mixing multiple products containing acetaminophen, such as a pain reliever and a cold medication or a prescribed narcotic.

Strength training is good for just about everyone. It's especially beneficial for people with arthritis. When properly done as part of a larger exercise program, strength training helps them support and protect joints, not to mention ease pain, stiffness, and possibly swelling. Yet, the thought of starting a weight training program can be daunting to many arthritis sufferers.

If you have arthritis and want to incorporate strength training into your health routine, these tips can help you get started.

An ad for an arthritis medication seems to suggest that taking it will alleviate or even eliminate morning stiffness, allowing you to hop out of bed. Like most drug ads, this one has unspoken messages and glosses over questions about side effects and cost.