Get Virtual Care
  • Primary Care
  • Urgent Care
  • FAQs
  • Support Center
For Businesses
  • Direct Primary Care for Organizations
  • For DMEs and Pharmacies
  • For Health Plans
  • For Providers
About Us
  • Who We Are
  • Why HealthTap
  • Our Standards
  • Contact
Log in
Book a video appointment
Book now
  • Get Virtual Care

    • Primary Care
    • Urgent Care
    • FAQs
    • Support Center
  • For Businesses

    • Direct Primary Care for Organizations
    • For DMEs and Pharmacies
    • For Health Plans
    • For Providers
  • About Us

    • Who We Are
    • Why HealthTap
    • Our Standards
    • Contact
Log in to HealthTap
HealthTap Online Primary Care Doctors Accepting New Patients
Book a video visit
HealthTap
Telehealth
A member asked:

My knees lock in the middle of the night while sleeping and i can't move my legs...i wind up in tears. what could be causing this?

A doctor has provided 1 answer
Dr. Anthony Leazzo answered

Low electrolytes: This could be from low potassium or magnesium levels. See your doctor for a blood test.

Answered 10/20/2012

5.5k views

Thank

Related Questions

A member asked:

What causes blotchy bruises on back of knee and leg? Red & almost black & blue. Have not sleep feet are tingling have legs elevated now it usually f

A doctor has provided 1 answer

A member asked:

Can sleeping position cause a tight quad muscle? I see a chiropractor regularly for neck issues - he adjusts the whole body - and he works on my IT band as it is very tight on the same leg and it causes me knee pain

A doctor has provided 1 answer

A member asked:

I enjoy sitting with my leg crossed over my knee, but often must stop because my leg will fall asleep from the point of contact, down. Cause 4 concrn?

A doctor has provided 1 answer

A member asked:

What would cause intense localized knee pain (wakes from sleep) that only occurs at night in 1 knee. No injuries, no pain in day. Worsening 3 weeks.

A doctor has provided 1 answer

A member asked:

I get this stabbing pain so bad in my right leg when laying down on my side. Goes away when Im standing. It makes my knee hurt so bad and preventing me from falling asleep. What could cause this?

A doctor has provided 1 answer

People also searched for:

Poor circulation in lower legs when I wake up lately. The back of my knees feel swollen. I'm sleeping in the same position. I've been easily winded.
Woke up this morning & my left leg(from knee down) was numb. I was sleeping on my back, my leg was to the side & bent. Can the position cause numbness?
Hi! At night time while sleeping I get numbness in both knees. I move my legs and numbness goes away. Had it over a year every night?
I was kicked in the side of my left knee, but I feel tingling and the feeling that my leg and foot go to sleep. Also when I put ice pack on it (not directly on skin) it feels like a stinging sensation. Could this be a bad tear in my meniscus?
What can cause pulling sensation in legs from around knee down to above ankle esp. when lying down and driving. Husband says I often twitch when sleep

Telemedicine

Primary Care
Manage Your Conditions
Women's Health
Children's Health
Men's Health
Senior Health
Wellness, Prevention & Lifestyle
Sexual Health
Mental & Behavioral Health
Travel Medicine
Urgent Care
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question

More of what we treat

Allergies
Antibiotics
Asthma
High Blood Pressure
Prescriptions
Type 2 Diabetes
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HealthTap
HIPAA logo
HIPAASecure
Soc 2 Type 2 logo
SOC 2 Type 2Certified
JCAHO Accredited
JCAHOAccredited

For Businesses

Direct Primary Care for OrganizationsFor DMEs and PharmaciesFor Health PlansFor Providers

Company

About UsSupport CenterContact Us

Health Content

Health TopicsDoctor Q&A by Specialty

Join Us

For DoctorsJobs
Member App

Download HealthTap

Video visit and message your doctor

Member App QR Code
Play Store Member LinkApp Store Member Link

Questions?

+1 (888) 828-0841support@healthtap.com
LinkedInTwitter
HomeTermsPrivacyCookiesDMCAHealth TopicsDoctors DirectoryDoctor Q&A by Specialty
Copyright 2026 HealthTap, Inc.