Pain and Sleep

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Gilles Lavigne

Gilles Lavigne,
DDS, MSc, FRCD

How significant is the pain and sleep problem?

In the adult population, about 15% of those surveyed report experiencing chronic pain. However, in older adults, that number rises dramatically to over 50%. Among those experiencing chronic pain, about 2/3 report poor or unrefreshing sleep. The problem of pain and sleep becomes even more complicated as commonly prescribed medications used to relieve pain, such as morphine and codeine can fragment sleep.

How does pain affect sleep?

First, we know from numerous studies that the problem of sleeplessness caused by pain is preventable with appropriate strategies. When pain is first experienced, most people do not experience sleeplessness. However, when pain becomes a problem, it can be a vicious cycle. If someone experiences poor sleep due to pain one night, he or she is likely to experience more problems the next night and so on. It gets worse and worse every night.

Also we know that pain triggers poor sleep. For instance, someone experiencing lower back pain may experience several intense microarousals (a change in the sleep state to a lighter stage of sleep) per each hour of sleep, which lead to awakenings. However, microarousals are innocuous for a person not experiencing chronic pain. Pain is a serious intrusion to sleep. Pain is frequently associated with insomnia and these coexisting problems can be difficult to treat. One problem can exacerbate the other.

What are the most common causes of the pain and sleep problem?

The major causes of sleep loss due to pain are back pain, headaches, facial pain caused by temporomandibular joint (TMJ) syndrome, which is characterized by pain in and around the ears and soreness of the jaw muscles. Also, muscoloskeletal pain, which includes arthritis and fibromyalgia, can lead to poor sleep. Women report problems with visceral and abdominal pain as well as premenstrual cramping. It's important to note that overall impact of visceral and abdominal pain in women is misunderstood. We need more studies in this area. Pain from cancer, the disease itself and its treatment, is also a major offender in causing poor