Can Dehydration Cause Muscle Pain?

If you’ve been experiencing regular muscle pain, particularly in large muscle groups like your legs, you might be wondering, “Can dehydration cause muscle pain?” The answer is yes, dehydration can cause muscle pain.

Regular, everyday activities such as sweating and going to the bathroom can drain your tissues of fluids and electrolytes. And if you’re not replacing those fluids, your muscles won’t be able to function effectively, leading to pain. However, muscle pain can have different causes.

To help you determine whether it’s dehydration or something else, we’ll take a closer look at the most common warning signs of dehydration and when you should seek medical attention.

How Dehydration Affects Muscle Function

Water and muscle function go hand-in-hand. If you’re not getting enough water and electrolytes, your muscles will suffer, and they may:

• Become stiff and inflexible: Electrolytes and water are essential for nerve signaling and muscle contractions. If your muscles are lacking fluids, they become stiffer, which can lead to cramps and spasms.
• Receive less blood: When you’re dehydrated, the amount of water in your blood decreases, and your blood volume does, too. The decrease in blood flow deprives your muscles of oxygen and nutrients, making them more susceptible to cramping and muscle aches.
• Have difficulties absorbing the impact caused by physical activity: When you’re dehydrated, your body produces less synovial fluid, which means less cushion on your joints to protect your bones from impact. With less protection, you’re more susceptible to injuries. Not only can your joints become stiff, leading to knee swelling or inflammation elsewhere, but you’re also likely to experience joint pain, muscle strain, and injuries such as exercise-induced muscle damage.
• Suffer from electrolyte imbalances: A lack of fluid and electrolytes can also disrupt the balance of minerals in your body, causing a sudden, involuntary leg cramp, also known as a charley horse.
• Be fatigued: A lack of electrolytes and water can also cause muscle fatigue, which increases muscle cramps and pain.

Since dehydration can have such severe effects on muscle function, it’s important to stay hydrated, especially when you’re physically active, outdoors in hot weather, or sick. Water helps your body support its vital organs and functions to cope with activity, maintain a healthy body temperature, and support your immune system.

Role of Water in Muscle Health

So, why is water so important anyway?

Water plays an important role in many of the body’s functions, such as:

• Delivering nutrients to cells
• Removing waste products that might otherwise build up in the body
• Protecting vital organs and joints
• Maintaining a healthy body temperature

Likewise, water is also an essential factor in muscle health because it:

• Helps muscles tighten, shorten, and lengthen during activity
• Carries nutrients and electrolytes to muscle cells so they can repair themselves
• Flushes out metabolic waste products to enhance muscle function
• Lubricates joints to prevent muscle strain, stiffness, and pain
• Maintains muscle tone and helps improve strength
• Reduces inflammation in the muscles

Impact on Electrolyte Balance

Your muscles also need electrolytes to function. Electrolytes are minerals in your blood and body fluids that carry an electric charge. Examples of common electrolytes are:

• Sodium
• Calcium
• Potassium
• Magnesium

These charged particles are crucial for maintaining homeostasis in the body, but they’re also important for muscle health. They help transmit the nerve signals that tell your muscles whether to contract or relax. They also help regulate the movement of water in and out of your cells, ensuring that you stay hydrated.

Even just a slight electrolyte imbalance can disrupt muscle function, contribute to dehydration, and cause other issues, such as muscle cramping, weakness, or fatigue. If left unaddressed, unbalanced electrolyte levels in the body can also cause more serious health problems, such as heart arrhythmias.

Muscle Contractions and Cramps

Dehydration occurs when your body loses too much fluid and electrolytes. Since water and electrolytes help regulate the nerve signals that trigger muscle shortening and lengthening, an imbalance leads to involuntary muscle contractions and uncomfortable muscle cramping.

Dehydration also reduces blood flow to muscles, limiting the delivery of oxygen and nutrients, which can make muscles more prone to cramping. When dehydrated, muscles also fatigue more quickly, which makes them more susceptible to cramps, especially if you’re working really hard while exercising.

Often, these painful muscle cramps occur in large muscle groups, which explains why you’re more likely to get cramps in your thighs, hamstrings, and calf muscles.

Dehydration can also worsen the muscle pain and stiffness that sets in 24 to 72 hours after intense physical exercise, also known as delayed-onset muscle soreness. Without proper hydration, blood flow to muscles is compromised, limiting the delivery of oxygen and nutrients, and hindering the waste removal, repair, and recovery processes that occur after exercise.

In some cases, dehydration can also contribute to skeletal muscle damage, ranging from minor muscle strains to a serious condition called rhabdomyolysis, where muscles break down too rapidly, creating a byproduct that damages the kidneys.

Symptoms of Dehydration-Related Muscle Pain

Some common warning signs of dehydration in adults include:

• Leg cramps and spasms
• Muscle fatigue and soreness
• General muscle pain and aches
• Thirst
• Dry mouth
• Dark yellow urine
• Dizziness
• Lightheadedness
• Headaches
• Fatigue

Symptoms of dehydration should never be ignored and are a sign that your body needs fluids.

Tips for Staying Hydrated

If you think your muscle aches might be caused by dehydration, here are some helpful tips on how to stay hydrated:

• Drink plenty of water.
• Choose electrolyte-rich beverages.
• Eat hydrating foods such as fresh fruits and vegetables.
• Monitor your urine color.
• Pay attention to your body’s signals.
• Avoid excessive alcohol and caffeine.

Staying hydrated in hot weather is particularly difficult. In this type of environment, drinking sports drinks or electrolyte solutions can also help you stay hydrated and replenish lost minerals from excessive sweating.

When To Seek Medical Attention

Most of the time, dehydration-related muscle pain can be treated at home with oral rehydration. Water and electrolyte-rich beverages such as sports drinks are your best options.

However, the following severe symptoms may be a sign that you’re experiencing a heat-related illness, and you should seek medical attention at an urgent care facility or emergency department right away:

• Intense pain that doesn’t improve after rehydrating and resting
• Persistent nausea or vomiting
• Confusion and irritability
• Rapid heart rate or breathing
• Sunken eyes
• Lack of urination or very dark urine
• Symptoms of heat exhaustion or heatstroke, including heavy sweating, dizziness, nausea, and a high body temperature above 104°F
• Symptoms of hypovolemic shock (a life-threatening condition), including low blood pressure, rapid heart rate, rapid and shallow breathing, clammy skin, fatigue, little to no urination, and confusion

Need Help Diagnosing Your Muscle Pain? We’re Here for You

If you’re uncertain whether your muscle pain is a result of dehydration or something else, we can help. The compassionate health care providers at Next Level Urgent Care can diagnose your symptoms and provide treatment so you start feeling like yourself again. Find a nearby location and download the Next Level app to get in line online.