Doc: Frequent body twitches are called fasciculations

Keith Roach
To Your Health

Dear Dr. Roach: I am a 68-year-old woman in good health. For the past several days, I have had muscle twitches all over my body — subtle ones, but nevertheless almost constant. This odd event has me worried. It would seem neurological in nature.

What could be going on?

B.P.

Dear B.P.: Frequent muscle twitches are called fasciculations, and they are quite common. As a primary-care doctor, I have patients who note these frequently, and fortunately, most often they go away as mysteriously as they came, only to return again, perhaps centered around a different area of the body. This condition is called “benign fasciculations,” and up to 70 percent of people will experience this.

However, there are some neurological diseases that can first show up as fasciculations. Fasciculations are typical of what are called “lower motor neuron” conditions. When they are accompanied by muscle atrophy and weakness, it raises the likelihood of a serious illness rather than benign fasciculations.

Perhaps the most feared disease with prominent lower motor neuron symptoms is ALS (amyotrophic lateral sclerosis), but there are several other related diseases. If your muscle twitching is associated with other neurological symptoms, you should be seen promptly by your regular provider or a neurologist.

Dear Dr. Roach: In a previous column, you stated that DNA can be damaged by chemotherapy and/or radiation.

I’m curious as to whether that damage can affect the outcome of DNA results for genealogy information.

J.P.

Dear J.P.: No; people who have had cancer treatment with chemotherapy or radiation still will get accurate results from DNA testing for genealogy or risk factor analysis. The damage done to the DNA is mostly in the cancer cells, and healthy cells have some means to repair any damage that may happen.

Unfortunately, there still is some likelihood of damage to the healthy cells, and that’s one of the reasons why people who have undergone cancer treatment are more likely to get another cancer, and why they need regular follow-up, even years after their cancer has been cured.

Email questions to ToYourGoodHealth@med.cornell.edu.