Why Is Nighttime Heartburn
More Dangerous?Day or
night, chronic reflux can gradually
damage the esophagus. It may lead
to inflammation and scar tissue
that narrows the esophagus. In some
people, chronic heartburn can lead
to Barrett's esophagus, changes in
the cells that increase the risk of
esophageal cancer.
But nighttime heartburn tends to
leave acid in the esophagus longer,
and therefore may cause more damage
than daytime heartburn.
"A good part of the explanation
is gravity," says Lawrence J.
Cheskin, MD, co-author of
Healing Heartburn and
associate professor of medicine at
the Johns Hopkins School of
Medicine in Baltimore, Md. During
the day, acids from the stomach may
briefly force their way into your
esophagus. But gravity quickly
pulls them back down to the
stomach.
When you're lying down, gravity
isn't pulling in the right
direction. Instead, the stomach
contents are pressing on the
sphincter muscle that connects the
esophagus to the stomach. In people
with GERD
- which means nearly
everyone with chronic heartburn -
the sphincter is faulty. It doesn't
fully close. So acids can reflux
back up into the esophagus. And
because you're lying down, once
acids get into the esophagus, they
can sit there for much longer than
during the day. That can increase
the damage.
Gravity isn't the only factor.
When you're awake, you naturally
swallow whenever acid begins to
reflux. This pushes the acid back
down into the stomach. Saliva also
contains bicarbonate, which can
neutralize stomach acid. But when
you're asleep, the swallowing
impulse is suppressed, Spechler
says.
Nighttime Heartburn and
Insomnia
The effects of nighttime
heartburn aren't confined to
esophagus. It can also result in
chronic insomnia. Nighttime
heartburn can wake you up and keep
you up.
"The symptoms definitely
aggravate insomnia," says Dave
White, who has suffered from
nighttime heartburn for years.
"I'll wake up with cutting
heartburn pain and then have to
wait for the effects of [medicine]
to kick in, which can take an hour
or so. When that happens, I'll just
get out of bed, since I know I'll
be up anyway."
One recent study showed just how
common nighttime heartburn can be.
Researchers questioned nearly
15,300 average people and found
that a whopping 25% reported having
nighttime heartburn. The results
were published in 2005 in the
journal CHEST.
Another 2005 survey of 1,900
people with GERD
in the U.S. and
Europe found that about half had
trouble sleeping at night. In these
people, GERD
symptoms caused a 22%
impairment of leisure activities
and a 15% impairment of their
ability to work. The findings were
presented during the 2005 Digestive
Disease Week, an international
conference for gastroenterologists.
So the pain - and consequences -
of nighttime heartburn go well
beyond that burning in your chest.