MdDS Makes You Feel Like You’re Still on the Boat

You’re standing in a small boat tied to a dock, waves moving you back and forth, up and down, and side to side. Now, imagine that you feel this way all the time, even without the boat. You can’t concentrate. Your head hurts. You’ve never felt so fatigued in your life. You don’t know what’s wrong and you need help.

Your diagnostic tests are all returning as normal. After several months of symptoms, you start to wish that you had a brain tumor just to have an explanation. Nobody, neither you nor the physician, made the connection that your symptoms started after you returned from that last vacation during which you were in a boat all day. Welcome to the world of someone with Mal de Débarquement Syndrome.

What is Mal de Débarquement Syndrome?

As a neurologist and scientist who studies Mal de Débarquement Syndrome (MdDS), I have heard countless stories just like this. Today, MdDS is rarely recognized immediately and is often misdiagnosed as Ménière’s disease, vestibular migraine, motion sickness, or even as a form of psychosomatic illness.

MdDS is literally translated as the “sickness of disembarkment.” It is a disorder of rocking vertigo and imbalance that starts after a period of motion exposure, such as going on a cruise, flying, or even a long car ride. Unlike short-lived land-sickness, MdDS can persist for months or years.

MdDS is a brain disorder

The MdDS phenomenon is the natural result of the human brain adapting to environmental motion and is thus the quintessential neurological disorder. How and why the brain gets “stuck” in this entrained state is a question that researchers, including those in my lab, are trying to answer. There is evidence for brain connectivity to spatial processing areas as being altered in MdDS, some of which can be reversed with treatment. This island of insight, however, is surrounded by a sea of unanswered questions that we hope to address with continued research.

For now, what we know is that if MdDS symptoms do not resolve within several months, the chances of remission get pretty slim. Medications such as benzodiazepines and some types of antidepressants can ease the symptoms, but the development of persistent MdDS often leads to other problems such as difficulties with attention, emotional control, pain modulation, and tolerance to sensory stimuli like light and sound.

Patients with MdDS have spent thousands of dollars on vitamins, diets, hyperbaric oxygen, induced altitude sickness, magnetic bracelets, chelation therapy, and antibiotics. Some have even had inner ear surgery to no avail. If you can name it, a desperate person with MdDS has likely tried it.

What physicians need to know

What physicians need to know to distinguish MdDS from other disorders of vertigo or dizziness is that affected individuals feel less of this internal motion when they are actually in motion. Getting into a car or back on a boat is a temporary reprieve from the otherwise constant symptoms. They remain symptomatic when they are still, such as standing or even lying down. In other words, they are never quite able to rest.

It turns out that this under-recognized and understudied disorder affects thousands of people every year, typically middle-aged women, though also a fair number of men. Research into MdDS has shown that factors related to the aging brain, hormonal changes, and stress contribute to the vulnerability of triggering an episode. One could take 15 cruises in a lifetime and have no problems, but the 16th one could trigger persistent MdDS.

I once experienced a brief episode of MdDS myself after a flight from Boston to Los Angeles. After a week, it dawned on me that if the symptoms continued, my medical career would be over. I was lucky that the symptoms eventually abated, but the experience showed me that MdDS could happen to anyone, even otherwise healthy, high-functioning, experienced travelers. Indeed, as more and more people travel for work or leisure in an increasingly interconnected world, recognition of travel related disorders like MdDS will be all the more critical.

Research funding and awareness of how everyday environmental stimuli, such as oscillating motion, can affect human health are needed in order to prevent disability from disorders like MdDS. We need greater insights into how motion disorders are related to brain dysfunction and especially in how to treat them.

Physicians must also play a central role in recognizing this disorder, providing counseling, avoiding unnecessary tests, and making appropriate referrals. Today, many patients go to their physicians with MdDS and get discouraged or derailed. These patients will testify that illnesses without a physical marker are some of the most devastating of human disorders. We need to affirm them as much as we do our patients with heart disease or broken bones.

Though we still need to develop more effective therapies for MdDS, we can at least lay a foundation for recovery by first giving the patients an identity.


Discussion Policy
  1. Kathleen Evans

    I was recently diagnosed by a neurologist with MDDS. I think I started having sometimes after a boat ride, but I can’t believe that one boat ride caused my dizziness. I have been an avid boater since I was eight years old and have never experienced any dizziness until the past year. I am not 100% certain that I actually have MDDS, while I experience a rocking sensation I do not have serious balance issues and when I am sitting or lying down I feel great with no dizziness at all. I am only dizzy when I am moving. It feels like I am on a boat dock when I walk and move around, however sometimes I experience no dizziness at all when I am moving. If I do have MDDS I think I have a mild case. I hope it doesn’t get worse in years to come .

  2. Darlene ONeal

    I was very lucky that the second neurologist diagnosed me.
    The difference was she really listened!!
    I was the first patient she had seen with MDDS.

    1. MdDS Foundation

      Darlene, is your doctor listed in our Find A Doctor tool? If not, please send their contact information to so that we may reach out to them about inclusion. Thank you.


      Do any males ever respond /reply?

  3. Judy Huffines

    I was diagnosed with Mal de Debarquement Syndrome in 2008 after a stressful trip to Alaska. I cope with this challenging condition by adhering to a regiment of medication (Clonazepam [doasage redacted] a day and [redacted] sertraline a day). I try to control my environment to elevate (sic) triggers that intensify this disorder. I also try to remain active by walking outside and doing yoga. I was in physical therapy for 5 years and this helped me get to a place where I could do yoga. I had brief episodes of MdDS in my late 20s and early 30s on more than one occasion after boat trips. I was prescribed a low dose of valium by ENT physicians and symptoms would disappear after a few weeks but the Dr’s never used the term Mal de Debarquement Syndrome. This condition has changed my live forever. I have suffered silently for many years for fear of judgement from family, friends, and my employer. Even my mother, who was a nurse, makes snide passive aggressive comments about my dizziness, and my supervisor often makes comments that make me feel awkward about this sickness. I guess I can understand somewhat, I look normal and I try my best to act normal and push through my life. However, what is going on inside my head is not normal and everyday is a challenge for me. This is what I know. It is imperative to have 2 legs in order to deal with this condition. I cannot imagine balance without both of my legs. I know stress and anxiety makes it worse. Not getting rest makes is unbearable. Loud noise, bright lights, patterned carpet, big box stores, malls, household chores such as ironing and vacuuming aggravate my condition. I work in Excel and that can heighten my symptoms. I feel it is getting more difficult for me to organize my mind and to articulate my thoughts and feelings through speech. I feel like my brain is getting eaten up by a cancer and everything I do takes twice as long as it used too. Mal de Debarquement Syndrome is an overlooked disability and I struggle with it everyday. It is exhausting but I will never give up. I have hope and I am a fighter.

  4. Gwen

    I got off my 7 day cruise to Alaska in 2004 and have never quit rocking and bobbing as you say. The first night I couldn’t sit in a chair, I felt The chair was tilted and I was sliding off and felt I had to try to hang on. I visited all local Dr’s. and they referred me to dizzy and balance clinics which helped a little but still felt like I was walking on a trampoline. Finally saw an ear specialist and he said mal debarquement and sent me to another balance clinic. I gave up. I take no meds for it. I detest grocery stores and trains. Sensitive eyes are a problem. I try to appear normal but never feel that way due to being so careful not to fall. Your articles validate all I live through each day. Thank you

  5. Brenda

    Had a vertigo 1st time 5 yrs. ago. Got better through therapy. Then had another bout about 6 months ago. Am back to my therapy exercises. Helps a little. But I am beginning to realize I will propably deal with this for the rest of my life. Ugh! I’m told it is vestibular vertigo. That just means theu don’t know what is causing it.

  6. Nancy Shen

    I’ve gotten into an unbalanced state after being on top of tall skyscrapers like the John Hancock tower in Chicago. It also happens when standing on a stable unmoving pier, but seeing the waves of water makes my brain feel like I’m in motion. Small boats, vehicles and planes don’t seem to cause a problem, it’s the large vessels like giant ferries and cruise ships.

  7. Debbie Young

    Thank you, Dr. Cha, for your dedication and providing your perspective. It means so much to see MdDS information in print.

    I’m in my 60s and have had MdDS for half of my life now. It came on immediately after a rough cruise. Symptoms continued for approximately a month then began to deminish. Little did I know my life would never be the same. Symptoms returned and I spent years searching for answers, but to no avail. All labs OK, MRI normal, etc. (Did have one doctor suggest I may just want to dye my hair blond, though. Not funny!) So I eventually stopped talking about how I felt. Tried to create diversions and live a normal life. Not always successful, but fell back on common sense approaches to living with this invisible illness. It was not until the Internet was available did I have a clue MdDS existed. I believe it was a link to your early research I discovered. As soon as I read that patients usually felt better while in motion, I knew we shared the same diagnosis. It was then that I finally felt some validation. So, thank you again, Dr. Cha! People suffering from MdDS don’t necessarily have to go through the mental humiliation brought on by a doubting medical community.

    1. Enough of Mdds

      After reading this I feel more disheartened and just time to give up.

      This disorder is unbearable and after over 3 years of rocking and falling what is the point?

      This life stealing beast should just kill us quickly. That would be compassion.

      1. MdDS Foundation

        We are sorry you feel this way. MdDS is a beast. We hope you find some support and compassion. The Foundation and the support groups are always here for you.

  8. Robert Serfas

    My heart goes out to all those people with this disorder.
    I have been suffering with it since 1977, 40 years, and was only diagnosed with it about 12 years ago, after numerous visits to doctors, none of which were able to find anything wrong. My symptoms began after an extremely rough flight in an air force transport aircraft and re-occurred periodically until another motion incident, a wild train ride that set in motion ( no pun intended ) the continuing daily saga that we MdDS rockers know. It is heartening to see some recognition of this rare malady and finally research funding to try to solve the puzzle of how it works. I am glad to see the improved website and will be watching for any new developments.
    Good health to all. I hope all your journeys are smooth and tranquil.

    Robert S.

  9. sharon lindsley

    When my symptoms came on – I DID NOT travel – I was dealing with a series of stress causing events ( I believe). I had had a few beers the night before and thought it was a weird hangover reaction – but it never went away…over 2 and 1/2 yrs later. Not letting it stop me – and meditation have helped me to deal with it..I don’t drink anymore but that hasn’t affected it one way or another. just paying attention and taking care of my self, knowing my limits (which I had to find out) Love swimming – no physical resistance, my body get a rest..

  10. Lola Brauer

    I got rid of my MDdS after eight months. I began a treatment with paroxetine for six months. Then changed to fluoxetine and i am on it. It works for me. Sometimes i need a very little dose of alprazolam. But fluoxetine ( prozac) helps a lot. I have had this episodes four times. All during more than three months. Always after a cruise

    1. Christine Lockett

      Hi Lola, many thanks, this is good to know.


  11. Christine

    Could you please let me know which kind of antidepressants can be most helpful?

    1. Felicia Lewis

      Yes. Finally, someone has pinpoint what has been happening with me! I kept telling the nineteen doctors I have seen about my problem for the past four years and only a one really understood me. Now here it is!
      Thank you Dr. Cha!

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