Ross said this family might need help with anxiety, but it's not a disorder.
But, Ross said, take "a young mother where finances aren't really a problem, the parents have secure jobs, they have a great marriage, the kids are doing well, but she's up worrying every night that they are going to lose their house, or someone's going to lose their job."
"They know this is a problem, they know that they're different from other people," Ross said. "They often say: 'I feel as if I just can't turn it off.'"
Although Ross said professionals have begun to diagnose generalized anxiety disorder much more accurately in the last decade, she has seen estimates that as many as three-fourths of people with the disorder have yet to be diagnosed.
Not only does the condition have a vague name, but patients who suffer from restless leg syndrome may have a hard time describing the vague symptoms to other people.
At its essence, restless leg syndrome (or RLS) is exactly what it sounds like: the urge to move your legs.
According to the Mayo Clinic, "sometimes the sensations seem to defy description," but often numbness or burning, crawling, jittery, tingling and aching sensations well up in the legs as the sufferer feels the need to move them.
While medicines can reduce the symptoms, there is no known cause for all RLS, according to the NIH. Pregnancy can bring on symptoms, as can vices -- caffeine, tobacco and alcohol.
A good way to immediately reduce RLS symptoms is to simply move your legs, stand up or walk around. However symptoms can become more problematic when people try to sleep.
As RLS gets worse in the evening and nighttime hours, the condition can interfere with sleep, turning a nuisance twitch into serious insomnia and daytime drowsiness.
People with irritable bowel syndrome (or IBS) have it hard enough dealing with the embarrassing bathroom symptoms, but according to gastroenterologists, they also have to deal with a poorly understood condition that has no quick treatment.
"There's actually nothing wrong with the physical gut; it's what we call a functional disorder," said Fasano, who is also the director of the Mucosal Biology Research Center at the University of Maryland School of Medicine.
IBS has all the intestinal symptoms of celiac disease and many of the symptoms of Chron's disease: abdominal pain, diarrhea, constipation, cramps and spasms.
Fasano said it was only in the 1970s that a series of experts got together in Rome and drafted what is known as the "Rome Criteria" for diagnosing IBS. Research since has uncovered a connection between IBS and the "intestinal pacemaker" responsible for creating the wave contraction of the intestine to digest food.
Have a faulty "intestinal pacemaker," and a person can have spasms and intense digestive pain. Other research has uncovered links between IBS and an imbalance of good bacteria in the gut.
Still, Fasano said an IBS diagnosis is often one of exclusion, meaning doctors must run a myriad tests to see whether another cause is behind the IBS symptoms before coming to a conclusion.
"IBS is embarrassing, IBS is not socially acceptable," said Fasano. "You may discuss diabetes or cancer, but what is amazing in all this is that IBS and even celiac disease are much more frequent than diabetes."
According to Fasano, gastroenterologists estimate "IBS affects easily, 20 [percent] to 25 percent of the population."