Muscle Twitches and Visual Disturbances Before Sleep - Neurology

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Hello, doctor.
I would like to describe my recent situation.
Sometimes, just as I am about to fall asleep, I experience muscle twitches or my limbs move involuntarily.
There have been instances where I wake up in the middle of the night to find my muscles twitching, and my vision appears to be flickering with what looks like stars for a brief moment, which disappears within two seconds after waking up.
In the morning, I usually feel like objects are vibrating, and after a few seconds (usually longer for my vision), it resolves.
I experienced similar symptoms about six months ago, but the muscle twitching was not as frequent as it is now.
At that time, I was concerned about multiple sclerosis (MS) and underwent visual, auditory, and olfactory evoked potentials, as well as awake EEG, but I did not have an electromyography (EMG) test.
Recently, I have been experiencing some muscle soreness in my legs, and my right hand was less dexterous for a while, but it has improved recently.
The muscle twitching continues, and I have noticed it occurring more in my legs (though my arms and face are also affected).
That's about it.
(I previously posted a question for the doctor, but it seems to have been lost in the system.
I check back every hour or so and noticed that the doctor responded to two posts between morning and noon.)

Dàxuéshēng, 20~29 year old female. Ask Date: 2021/04/30

Dr. Hong Weibin reply Neurology


Hello: There are many types of muscle twitching, including muscle fasciculation, muscle myokymia, muscle spasm, and muscle myoclonus, among others (which are difficult to translate into Chinese).
The causes are quite diverse, with the most common being stress, electrolyte imbalances, lack of sleep, dehydration, excessive caffeine or stimulant intake, certain medications, fatigue, kidney disease, and diabetic neuropathy, among others.
The vast majority of simple muscle twitching is due to the conditions described above.
If your English is good, you can refer to the following information for a better understanding, as it provides a detailed explanation of the causes of muscle twitching and spasms: https://www.webmd.com/brain/ss/slideshow-twitches-spasms-causes.
Thank you~~ If you are very concerned, it is advisable to consult a neurologist for assistance.

Reply Date: 2021/04/30

More Info


Muscle twitches and visual disturbances before sleep can be concerning symptoms that may indicate underlying issues. Based on your description, it seems that you experience muscle twitches as you are about to fall asleep, along with visual disturbances that resemble "seeing stars." These symptoms can be quite alarming, especially when they disrupt your sleep or lead to feelings of anxiety about potential neurological conditions like multiple sclerosis (MS).

Muscle twitches, also known as myoclonus, can occur for various reasons. They are often benign and can be triggered by stress, fatigue, caffeine intake, or even dehydration. In your case, the fact that these twitches occur as you are falling asleep suggests that they may be related to the transition between wakefulness and sleep. This transition can sometimes cause the body to react with involuntary muscle contractions, which is a common phenomenon known as hypnic jerks. These jerks are typically harmless and are experienced by many people.

The visual disturbances you describe, such as seeing flashes of light or "stars," can also occur during this transitional phase. This phenomenon is often referred to as "phosphenes," which are sensations of light that occur without light actually entering the eye. They can be caused by various factors, including pressure on the eyes, fatigue, or even changes in blood flow as you relax into sleep.

Your experience of feeling like objects are vibrating or moving upon waking could be related to a temporary disorientation that occurs as your brain transitions from sleep to wakefulness. This is not uncommon and can happen when the brain is still processing sleep-related signals while trying to interpret visual input from the environment.

Given that you have a history of muscle twitches and visual disturbances, it is important to consider a few factors that may contribute to your symptoms. Stress and anxiety can exacerbate muscle twitches and disrupt sleep patterns, leading to a cycle of fatigue and increased twitching. Additionally, if you consume caffeine or other stimulants, it may be beneficial to reduce or eliminate these substances, especially in the hours leading up to bedtime.

If you are experiencing persistent symptoms, such as muscle pain or weakness, it may be advisable to consult a healthcare professional, particularly a neurologist. They can perform a thorough evaluation, which may include tests such as electromyography (EMG) to assess muscle activity and rule out any underlying neurological conditions. It is also important to discuss any medications you are currently taking, as some can have side effects that affect muscle function and sleep.

In the meantime, consider implementing good sleep hygiene practices. This includes maintaining a regular sleep schedule, creating a relaxing bedtime routine, and ensuring your sleep environment is conducive to rest. Techniques such as mindfulness meditation, deep breathing exercises, or gentle stretching before bed may help reduce stress and promote relaxation, potentially alleviating some of your symptoms.

In summary, while muscle twitches and visual disturbances can be concerning, they are often benign and related to factors such as stress, fatigue, or sleep transitions. However, if symptoms persist or worsen, seeking medical advice is essential to rule out any serious conditions and to receive appropriate care.

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