Several medical conditions can make a person feel weak, shaky, and tired. They include dehydration, irregular heart beat, Parkinson's disease, and chronic fatigue syndrome. Treatment will depend on the condition a person has.
If you suddenly feel weak, shaky, or lightheaded—or if you even faint—you could be experiencing hypoglycemia. A headache that comes on quickly, weakness or tremor in your arms or legs, and a slight trembling of your body are also signs that your blood sugar is too low.
Muscle weakness is commonly due to lack of exercise, ageing, muscle injury or pregnancy. It can also occur with long-term conditions such as diabetes or heart disease. There are many other possible causes, which include stroke, multiple sclerosis, depression, fibromyalgia and chronic fatigue syndrome (ME).
Hydrate Before, During and After Exercise
Muscles need electrolytes to help prevent fatigue. Sweating can cause rapid loss of electrolytes. Use a good quality electrolyte sports drink during activity, and follow with plenty of water. Tired muscles that are low on electrolytes may cause body shakes when tired.
Internal vibrations, also known as internal tremors, can feel like a person is shaking on the inside. They typically affect people with Parkinson's disease, multiple sclerosis, or essential tremor. Internal tremors are shaking sensations felt inside the body.
Stress is a common cause of “buzzing” anywhere on or in the body. Some people say they have a “case of the nerves” when they buzz, tremble, shake, or vibrate when nervous, anxious, or stressed. Buzzing anywhere on or in the body is a common indication of anxiety and stress.
Trembling, shaking, and vibrating commonly occur due to a lack of sleep. The combination of a anxiety, stress, hyperstimulation, and sleep deprivation can cause a wide range of symptoms, including those that affect the body's muscles and nervous system.
Feeling shaky is a common symptom of anxiety, and one that most people have experienced at some point in their life. It's sometimes possible for shaking to be the only symptom or one of the first symptoms people notice when they're feeling nervous.
Acute Fatigue as Urgent/Emergent
If the fatigue is associated with chest pain, shortness of breath, irregular heart rate, or sense of imminent passing out, these are urgent conditions that warrant immediate medical attention. These could be symptoms of a serious heart condition or major vascular insufficiency.
Get moving.
Exercise is a natural energy booster, because whenever you do it, oxygen-rich blood surges through your body to your heart, muscles, and brain. Regularly squeezing a workout into your day -- even if you can spare only 10 minutes at a time -- will help keep your energy levels at their peak.
Signs and symptoms of weakness can include trouble doing daily tasks, such as grooming or writing or problems with gait and loss of balance. Many people use the term weakness as a synonym for tiredness, weariness, lack of energy or fatigue, although this is not technically correct.
If you're mentally exhausted, you may experience brain fog, or difficulty concentrating. You could also feel physically tired if your anxiety causes muscle tension, and you might feel sleepy if anxiety interferes with your sleep. In any case, it's best to talk to a doctor or mental health provider about your concerns.
The most common causes of imbalance without dizziness are related to dysfunction of the muscles, joints and peripheral nerves (proprioceptive system), or the central nervous system (brain). People with bilateral vestibulopathy have balance issues but no dizziness if the damage affects both ears at the same time.
"The term for this is sleep myoclonus, or hypnic myoclonus, and occurs when your brain is shifting from one sleep phase to another.
What Does Vibration in Multiple Sclerosis Feel Like? The vibrating sensation people with MS feel generally isn't painful, but it can be annoying or confusing. “It's like throbbing vibrations,” one MyMSTeam member described. “It's not too bad, but I could really do without it.”
Your heart rate, breathing, and blood pressure all increase as your body prepares itself to deal with the stressor. In this situation, your body and brain interpret anxiety as a signal to either escape from danger or stand your ground. This primes your muscles to act, which leads to shaking or trembling.
Paresthesias are a common symptom of fibromyalgia and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). Paresthesia is defined as abnormal sensations such as tingling, crawling, itching, numbness, and prickling. Most of the time, paresthesias aren't painful.
tingling or a “pins and needles” sensation. aching or burning pain. numbness or poor feeling in the affected area. feeling that the affected area has “fallen asleep”
There are a number of reasons that we may wake up feeling shaky and experiencing trembling, and whilst this can be quite alarming, it is often not due to any emergency cause. The most common reasons that we may experience shaking are due to low blood sugar levels and anxiety, as you have mentioned.
Symptoms of stress-related exhaustion
While the main symptoms of fatigue are a general feeling of weariness or being tired or drowsy, stress-related fatigue is usually accompanied by other symptoms: Sore or aching muscles, or feeling of muscle weakness. Headache. Moodiness, irritability, or easily agitated.
You may be too exhausted even to manage your daily affairs. In most cases, there's a reason for the fatigue. It might be allergic rhinitis, anemia, depression, fibromyalgia, chronic kidney disease, liver disease, lung disease (COPD), a bacterial or viral infection, or some other health condition.