Restless Legs Syndrome vs. Insomnia: What’s Keeping You Awake?

You're absolutely exhausted. You finally crawl into bed, turn off the light, and get comfortable, only to discover that sleep is nowhere to be found. Maybe your legs begin to tingle, ache, or feel as though something is crawling beneath the skin. Moving them helps, but only temporarily. Or perhaps your body is perfectly still while your mind remains wide awake, reviewing tomorrow’s schedule, replaying conversations, and wondering why you cannot fall asleep.

Both restless legs syndrome and insomnia can keep you awake, leave you drained the next day, and turn bedtime into something you dread. However, they are not the same condition. Understanding what is preventing you from sleeping is an important first step toward finding the right treatment.

If you are searching for help with restless legs syndrome in Houston, TX, or need an experienced sleep doctor in Houston or sleep doctor in Austin, the team at Comprehensive Sleep Medicine Associates (CSMA) can help determine what is happening after the lights go out.

What Is Restless Legs Syndrome?

Restless legs syndrome, or RLS, is a neurological condition that produces an irresistible urge to move the legs. It is also called Willis-Ekbom disease.

People often describe the feeling as:

• Crawling or creeping

• Pulling or tugging

• Tingling

• Throbbing

• Aching

• Itching deep inside the legs

• An uncomfortable buildup of energy

• A sensation that is difficult to describe but impossible to ignore

RLS sensations usually begin or become worse when a person is resting. Sitting through a movie, taking a long flight, riding in a car, or lying in bed can trigger symptoms. Moving the legs, stretching, walking, or pacing typically provides at least temporary relief.

The timing also matters. According to the National Institute of Neurological Disorders and Stroke, RLS symptoms most often occur in the late afternoon or evening and become worse at night. This pattern is one of the clues that helps distinguish RLS from muscle cramps, joint pain, and other conditions.

Although the name refers to the legs, some people experience similar sensations in their arms. Symptoms may occur occasionally, appear in cycles, or become frequent enough to seriously disrupt sleep.

What Is Insomnia?

Insomnia is a sleep disorder involving ongoing difficulty falling asleep, staying asleep, or getting restorative sleep despite having an adequate opportunity to sleep.

A person with insomnia may:

• Lie awake for a long time before falling asleep

• Wake repeatedly throughout the night

• Wake earlier than intended and be unable to return to sleep

• Feel as though sleep is light or unrefreshing

• Worry about whether they will be able to sleep

• Experience fatigue, irritability, or difficulty concentrating during the day

Short-term insomnia may develop during periods of stress, illness, travel, grief, or major life changes. Chronic insomnia generally involves sleep difficulty at least three nights per week for three months or longer, along with noticeable daytime consequences.

Insomnia is not simply the occasional bad night. It becomes a clinical concern when poor sleep develops into a persistent pattern that interferes with daily functioning, mood, performance, or quality of life.

For patients looking for help with sleep insomnia in Houston, TX, a comprehensive evaluation can help identify the factors that are keeping the cycle going.

Restless Legs Syndrome vs. Insomnia: What Is the Difference?

The simplest distinction is this: Restless legs syndrome creates a physical urge to move, while insomnia describes persistent difficulty sleeping.

With RLS, a person may want to sleep but cannot remain still or comfortable long enough to do so. With insomnia, the person may be physically comfortable but unable to initiate or maintain sleep.

Here is a quick comparison:

Symptom or Pattern	Restless Legs Syndrome	Insomnia
Irresistible urge to move the legs	Common	Not typical
Uncomfortable sensations in the legs	Common	Not a defining symptom
Temporary relief from walking or stretching	Common	Usually does not resolve the problem
Symptoms worsen while resting	Common	Not necessarily
Symptoms are worse in the evening or at night	Typical	Sleep difficulty occurs around the intended sleep period
Racing thoughts or anxiety about sleep	May develop secondarily	Common
Trouble falling or staying asleep	Common consequence	Primary feature
Daytime fatigue and poor concentration	Possible	Common

The distinction sounds straightforward, but there is an important complication: restless legs syndrome can cause insomnia.

Can You Have RLS and Insomnia at the Same Time?

Yes. In fact, the two conditions frequently overlap. Imagine experiencing uncomfortable sensations every night when you get into bed. You get up, walk around, return to bed, and feel the sensations begin again. After several nights—or several months—you may start to associate bedtime with frustration.

Eventually, even on a night when the leg sensations are mild, you might lie awake anticipating them. You may check the clock, become anxious about the next day, or try to force yourself to sleep. This can create an insomnia pattern on top of the original RLS.

That means treating only the insomnia without recognizing the leg symptoms may not provide lasting relief. Likewise, addressing RLS may reduce the physical discomfort while leaving behind sleep habits and anxiety that also require attention.

This is one reason a specialized sleep evaluation can be so valuable. Sleep disorders rarely read the textbook and politely arrive one at a time.

How Can You Tell Which Condition May Be Keeping You Awake?

Ask yourself what happens during the period when you are trying to sleep.

RLS may be more likely if:

• You feel a powerful need to move your legs

• The sensations begin when you sit or lie down

• Walking, stretching, or moving brings temporary relief

• Symptoms are noticeably worse at night

• You have difficulty describing the sensation as ordinary pain

• Long periods of sitting also trigger symptoms

• A family member has been diagnosed with RLS

Insomnia may be more likely if:

• You feel tired but remain mentally alert

• Your thoughts race when the room becomes quiet

• You frequently watch the clock or worry about not sleeping

• You wake during the night without leg discomfort

• Your sleep problems began during a stressful period

• Your sleep schedule or bedtime habits have become inconsistent

• You regularly wake too early and cannot fall back asleep

These clues are helpful, but they are not a substitute for a diagnosis. Leg discomfort may also be related to muscle cramps, arthritis, neuropathy, circulation problems, medication effects, or another medical condition. Sleep difficulty can also result from sleep apnea, circadian rhythm disorders, pain, mood conditions, medication use, or other sleep disorders.

What Causes Restless Legs Syndrome?

The exact cause is not always known. RLS can run in families, particularly when symptoms begin earlier in life. Research also suggests that the condition may involve brain pathways related to dopamine and movement.

RLS can sometimes be associated with:

• Low iron levels

• Pregnancy

• Kidney disease

• Peripheral neuropathy

• Certain neurological or chronic medical conditions

• Some prescription and over-the-counter medications

• Caffeine or alcohol use in susceptible individuals

Fatigue, sleep deprivation, and stress may make symptoms feel worse. Unfortunately, that can create another frustrating loop: RLS interferes with sleep, and inadequate sleep may intensify RLS symptoms.

Because iron may play a role, a medical provider may order bloodwork to evaluate iron stores and related health concerns. However, patients should not begin high-dose iron supplements without medical guidance. Too much iron can be harmful, and an appropriate treatment decision depends on more than a standard anemia test.

What Causes Insomnia?

Insomnia may have one or several contributing factors, including:

• Stress, anxiety, or depression

• An inconsistent sleep schedule

• Shift work or frequent travel

• Chronic pain

• Menopause or other hormonal changes

• Certain medications

• Caffeine, nicotine, or alcohol

• Excessive screen exposure close to bedtime

• Sleep apnea

• Restless legs syndrome

• Fear or anxiety associated with the sleep environment

Insomnia can also become self-reinforcing. The harder you try to make sleep happen, the more alert and frustrated you may become. Spending extra hours in bed, taking long naps, or changing your bedtime every night may feel logical in the moment but can make the body’s sleep pattern less predictable.

That is why effective insomnia treatment involves more than being told to “relax” or put the phone away. Sleep hygiene can be helpful, but chronic insomnia often requires a structured, personalized approach.

How Are RLS and Insomnia Diagnosed?

RLS is primarily diagnosed through a detailed discussion of symptoms and medical history. A sleep specialist will want to know:

• How the sensations feel

• When they occur

• Whether movement provides relief

• How often symptoms appear

• Which medications and supplements you take

• Whether relatives have experienced similar symptoms

• How the problem affects your sleep and daytime functioning

Blood testing may be used to look for iron deficiency or other contributing conditions. Insomnia is also diagnosed through a careful medical and sleep history. You may be asked to keep a sleep diary that tracks your bedtime, estimated sleep time, awakenings, wake time, naps, caffeine use, and daytime symptoms.

A sleep study is not required for every case of RLS or insomnia. However, testing may be recommended if your provider suspects sleep apnea, periodic limb movements during sleep, unusual nighttime behaviors, or another disorder.

Periodic limb movements during sleep are repeated, involuntary movements that occur after a person falls asleep. They are different from the conscious urge to move associated with RLS, although the two can occur together.

How Are These Conditions Treated?

While treatments may vary, in general, treatment for insomnia or restless legs syndrome should focus on the actual cause of the sleep disruption rather than simply making you drowsy.

Treatment for restless legs syndrome may include:

• Identifying and addressing low iron levels

• Reviewing medications that could worsen symptoms

• Adjusting caffeine and alcohol use

• Establishing a consistent sleep schedule

• Incorporating moderate movement or stretching

• Treating related health conditions

• Using RLS-specific medication when clinically appropriate

Medication decisions require care because benefits and long-term risks differ among available options. The current American Academy of Sleep Medicine guideline includes recommendations for specific treatments and cautions against routine use of some older approaches because symptoms can worsen over time—a complication called augmentation.

Treatment should therefore be personalized by a qualified provider rather than based on a borrowed remedy or an online checklist.

Treatment for insomnia may include:

• Cognitive behavioral therapy for insomnia, or CBT-I

• A personalized sleep schedule

• Techniques to reduce sleep-related anxiety

• Changes to habits that weaken the sleep-wake rhythm

• Treatment of RLS, sleep apnea, pain, or another underlying condition

• Medication when appropriate and monitored by a medical provider

CBT-I is a structured approach that addresses the thoughts, behaviors, and patterns that perpetuate chronic insomnia. It is much more comprehensive than basic sleep hygiene and can help patients rebuild a healthier relationship with sleep.

The right plan depends on whether the main problem is RLS, insomnia, another sleep disorder, or a combination of conditions.

When Should You See a Sleep Doctor?

Consider scheduling an evaluation if:

• Leg sensations regularly interfere with sleep

• You frequently need to walk or move at night

• Sleep difficulty has lasted several weeks or longer

• Fatigue affects your work, driving, relationships, or concentration

• Over-the-counter sleep aids are not helping

• You rely on sleep medication but still do not feel rested

• A bed partner notices frequent kicking, jerking, snoring, or breathing pauses

• You cannot tell whether RLS, insomnia, or another disorder is responsible

A sleep doctor in Houston or sleep doctor in Austin can look beyond the obvious symptoms and evaluate the complete picture—including your medical history, medications, nighttime experiences, and daytime health.

Frequently Asked Questions About Insomnia and Restless Legs Syndrome

Is restless legs syndrome a type of insomnia?

No. Restless Legs Syndrome is a neurological sensorimotor disorder, while insomnia is a sleep disorder involving difficulty falling asleep, staying asleep, or obtaining restorative sleep. However, RLS can trigger or worsen insomnia.

What does restless legs syndrome feel like?

People commonly describe crawling, pulling, tingling, aching, itching, throbbing, or an internal sense of restlessness. The defining feature is usually an urge to move that becomes worse during rest and improves temporarily with movement.

Can anxiety cause restless legs syndrome?

Anxiety does not necessarily cause RLS, but stress and sleep loss may intensify symptoms. Anxiety can also cause generalized restlessness that may be mistaken for RLS, making a professional evaluation important.

Does RLS happen only at bedtime?

No. Symptoms can occur whenever you remain inactive for an extended period, such as during a movie, meeting, car ride, or flight. However, RLS typically becomes more noticeable in the evening and at night.

Can low iron cause restless legs syndrome?

Low iron levels can contribute to RLS, even in some people who have not been diagnosed with anemia. A provider may recommend appropriate blood testing before deciding whether iron treatment is needed.

Will a sleep study diagnose insomnia or RLS?

These conditions are often diagnosed through symptoms and medical history. A sleep study may be recommended when another disorder—such as sleep apnea or periodic limb movements—is suspected.

Can over-the-counter sleep aids make RLS worse?

Some products, including certain sedating antihistamines, may worsen RLS symptoms in some people. Talk with your healthcare provider before starting or regularly using an over-the-counter sleep aid.

When should I seek help for insomnia?

Schedule an evaluation when sleep problems persist, recur frequently, cause significant daytime symptoms, or begin affecting your health, mood, safety, or quality of life. You do not have to wait until exhaustion becomes your permanent personality.

Stop Guessing About What Is Keeping You Awake

Whether your legs refuse to settle, your mind refuses to switch off, or both seem to have formed a midnight committee, persistent sleep problems deserve proper attention.

Comprehensive Sleep Medicine Associates evaluates and treats insomnia, restless legs syndrome, sleep apnea, and other complex sleep disorders. With locations in the Houston Medical Center, Sugar Land, The Woodlands, and Austin, CSMA provides experienced sleep and neurological care close to home. CSMA’s specialists can assess your symptoms, identify contributing conditions, and create a personalized treatment plan designed for more restful nights and better days.

If you are looking for treatment for restless legs syndrome in Houston, TX, help with sleep insomnia in Houston, TX, or an experienced sleep doctor in Austin, now is the time to stop guessing.

Schedule an appointment with CSMA and take the first step toward understanding what is keeping you awake.