One minute youresnoozing peacefully, the next youre wide awake in the dead of night.

Here are eight common reasons, plus what you might do to get a good nights rest.

Your room is too hot, cold, noisy, or bright.

woman laying in bed at night on her cell phone

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(Some schools of thought lump together stages 3 and 4.)

The first stage of sleep is the lightest, Dr. Aouad explains.

Ideally, your room should be dark, comfortably cool, and quiet when you sleep.

Doing so may involvecognitive behavioral therapy, anti-anxiety medication, or a combination of the two.

Meditation and deep-breathing exercises can also sometimes alleviate symptoms in some people, Dr. Okeke-Igbokwe says.

Your full bladder cant wait until the morning.

You had a couple of alcoholic drinks.

This is because alcohol can play around with your sleep stages in various ways.

Everyone metabolizes alcohol differentlydepending on factors like genetics, diet, and body size.

Since drinking often happens at night, we realize that can be an optimistic time cushion.

Based on your personal factors and how much you drank, you might not need that much.

Double whammy, that one.

Youve got sleep apnea.

This disorder slows and/or stops your breathing while you are asleep.

Complex sleep apnea features characteristics of both conditions.

You have an overactive thyroid gland.

This gland controls the function of several other organs, Dr. Gaffney Adams tells SELF.

You ate right before bedtime, or you didnt eat recently enough before you went to sleep.

Theres the simple fact that your growling, crampy stomach can wake you up.

Hunger could also mess with your blood sugar while you sleep, especially if you havediabetes.

Going too long without eating can provoke hypoglycemia, which is when yourblood sugardrops too low.

Although hypoglycemia can happen to anyone, its much more likely in people with diabetes.

You have restless legs syndrome.

If you have RLS, youll also feel an uncontrollable urge to move your legs.

Sometimes there are other underlying issues bringing about RLS as well, such as iron deficiency.

They may also be able to counsel you on home remedies to soothe your muscles, like warm baths.

Some are pretty easy to change on your own, others not so much.