While migraine headache is far more common in women, cluster headache is more common in men. The term "cluster headache" is used to describe the clustering of short, painful, one-sided headache attacks. These attacks can occur many times during the day from weeks to months at a time, and then stop for a few weeks or months.
Low Back Pain
Approximately 80 percent of Americans will have at least one bout with back pain during their lifetimes, according to the American Association of Orthopedic Surgeons. In fact, Americans see their doctors for low back pain more than any other reason except the common cold and flu.
Types of Chronic Pain
When pain lasts for a long time, it is considered to be chronic pain. Many physicians consider pain to be chronic when it has lasted for six months or longer.