Diabetes Archive

On call

Q. My feet tingle or feel numb like they are asleep at times, mostly when I am in bed or with my legs elevated. What causes that?

A. The symptoms you describe may be related to peripheral neuropathy, which is nerve damage that affects multiple nerves leading out from the spinal cord to the arms and legs. Symptoms are often equal in both feet. If only one foot, or part of a foot, is affected, this suggests compression of an individual nerve.

We don't yet have a vaccine to prevent COVID-19, but it's still important to get your regularly scheduled shots.

You're not alone if you're avoiding doctor visits because of concerns about COVID-19. But forgoing medical care means you may be skipping needed vaccinations. "That's a huge problem already. Possibly over a hundred million people the world over have missed their vaccinations because of the pandemic," says Dr. Shiv Pillai, an immunologist and professor of medicine at Harvard Medical School.

Going without vaccinations may increase your risk for illness, such as influenza. "We still are just as vulnerable to infection, and we need vaccines to be protected; COVID-19 doesn't change that," says Harvard Health Letter editor in chief Dr. Anthony Komaroff.

News briefs

A modest uptick in the amount of fruit and vegetables you eat can help ward off type 2 diabetes, according to a study published online July 8, 2020, by The BMJ. From a much larger study involving some 340,000 people from eight European countries, scientists selected 9,754 participants who were newly diagnosed with diabetes over a decade. Researchers compared the fruit and vegetable intakes of these people to those of about 13,000 participants who remained diabetes-free during the study period. Researchers also measured blood levels of seven key plant-derived nutrients, including vitamin C and brightly colored antioxidant pigments called carotenoids. People with the highest intakes of fruit and vegetables and the highest blood levels of the plant-derived nutrients were 25% to 50% less likely to get diabetes during the study period, compared with those who ate the least of these food groups or had the lowest nutrient levels. Even better, it didn't take a whole lot of extra green, red, yellow, and orange on the plate to make a dent in diabetes risk. The equivalent of only two-thirds of a medium apple or just over one-third of a cup of mixed fruit each day offered protection.

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In the journals

Not only can regular leg stretching help reduce cramps and muscle strains, it also may be another way to protect against heart disease and stroke. A study published online July 1, 2020, by The Journal of Physiology found that performing simple leg stretches can help improve blood flow throughout the body.

Researchers split 39 healthy people into two groups. One group didn't do any stretching. The other group performed four types of leg stretches five times a week for 12 weeks. The stretches focused on the hip, knee, and ankle. Each stretch was done for 45 seconds with a 15-second recovery. Afterward, the researchers found that the arteries in the lower legs of the stretching group had better blood flow and less stiffness. The stretching group also had lower blood pressure at the end of the study compared with their initial readings.

Ask the doctors

Q. I have hemorrhoids. Could this increase my risk of colon cancer?

A. In short, no. Hemorrhoids don't cause or increase your risk for colon or rectal cancer. However, the two conditions may be mistaken for one another because they can produce similar symptoms, such as rectal bleeding, itching, and pain.

Living with the pain and fatigue of fibromyalgia is a challenge faced by millions of people. Finding a doctor who understands the condition and how to treat it can be hard, but knowing the facts about your condition and what questions to ask can help you find the right doctor.

News briefs

Eating a diet high in foods tied to inflammation — such as processed meat, sweets, and refined grains — is associated with many health problems, including an increased risk for colon cancer, heart disease, stroke, or diabetes. A Harvard study published online May 7, 2020, by Gastroenterology found another potential risk: Crohn's disease, a condition characterized by areas of inflammation throughout the large and small intestines. Researchers evaluated 30 years' worth of self-reported diet information from more than 208,000 men and women. Diets were scored based on foods that promote inflammation. Compared with people who had the lowest inflammatory diet scores, people with the highest scores had a 51% higher risk for developing Crohn's disease. The risk for Crohn's doubled among people who went from a low- to a high-inflammatory diet during the study. The study is observational and doesn't prove that an inflammatory diet causes Crohn's disease. But with so many other risks associated with foods that promote inflammation, it's important to eat as many foods that fight inflammation as possible. In other words, focus on whole, unprocessed foods with no added sugar — such as vegetables, fruits, whole grains, legumes (beans, lentils), fish, poultry, nuts, seeds, a little bit of low-fat dairy, and olive oil.

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News briefs

First it was certain blood pressure and heartburn drugs; now some medications used to treat type 2 diabetes are being recalled because of cancer concerns. The FDA warned in late May and early June 2020 that some lots of extended-release metformin may contain unacceptable levels of N-nitrosodimethylamine (NDMA), a possible cancer-causing chemical. At least five manufacturers are now issuing voluntary recalls of the medications. But if you take extended-release metformin, don't just stop on your own. Not all extended-release metformin products are affected by the voluntary recalls, and stopping any medication that controls blood sugar can be very dangerous. The FDA advises that you check in with your doctor or pharmacist. Ask if your medication is affected by the recall; if so, ask if you should switch to another version of the drug.

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Ask the doctor

Q. COVID-19 is an unprecedented public health emergency. Why can't we go faster in developing drugs for it that are effective and safe?

A. That's what we all want: fast, effective, safe. But we can't usually have all three, so we settle for effective and safe.