Hyperkalemia is a condition that occurs when you have too much potassium in your blood. Potassium is a mineral that allows your nerves, cells, and muscles to function properly.

Everyone needs potassium. Though the mineral is vital to overall health, too much potassium in your blood can be dangerous. A normal potassium blood level is between 3.5 and 5.0 millimoles per liter (mmol/L).

Potassium is in many foods, including fruits and vegetables. The recommended amount of potassium to consume is 4,700 milligrams (mg) per day.

But some people may consume potassium in larger amounts. You may take potassium supplements while eating a high potassium diet.

Or, you may take a medication that causes your kidneys to hold on to extra potassium. This allows the nutrient to accumulate in your bloodstream.

Your potassium level can also increase if you have a condition that affects kidney function, such as chronic kidney disease or diabetes. This can make it difficult for your kidneys to filter excess potassium from your blood.

Hyperkalemia is dangerous because it can affect the muscles that control your heartbeat and breathing. This can cause complications such as trouble breathing, irregular heart rhythms, and paralysis.

It’s important to recognize symptoms of high potassium as soon as possible. Some people don’t have symptoms at all. But when symptoms occur, they typically include the following.

Too much potassium in your blood doesn’t only affect your heart muscles. It can also affect the muscles throughout your body.

You can develop muscle fatigue or muscle weakness due to high potassium levels. Simple activities like walking can make you feel weak.

Your muscles may also lose their ability to function properly, resulting in exhaustion. You may even experience a dull, continuous ache in your muscles. It can feel as if you’ve completed a strenuous activity or exercise even if you haven’t.

Having too much potassium in your bloodstream also affects nerve function.

Potassium helps your nerves fire signals to your brain. But this becomes difficult when there’s too much potassium in your blood.

You may gradually develop neurological symptoms such as numbness or a tingling “pins and needles” sensation in your limbs.

Hyperkalemia can also have a negative impact on your digestive health. For some people, too much potassium has been associated with vomiting, nausea, and stomach pain. It can also cause loose stools.

A serious side effect of hyperkalemia is the risk of developing an irregular heartbeat. This happens when damage occurs to the muscles controlling your heart.

An irregular heartbeat is when your heart beats either too fast or too slow. This can cause heart palpitations, chest pain, and even lead to a heart failure.

Heart palpitations can feel as if your heart has skipped a beat. Your heart may also race or flutter.

This feeling isn’t only felt in the chest. Some people feel palpitations in their neck and throat, too.

If you’re having a heart rhythm problem, you might feel a tight pressure in your chest that radiates to your arms and neck. Other symptoms like indigestion or heartburn, a cold sweat, and dizziness can also occur. If you experience these symptoms, call 911 or seek emergency medical attention right away.

Shortness of breath or a “winded feeling” is another symptom of a high potassium level.

This symptom develops when hyperkalemia starts to affect the muscles that control breathing. Your lungs don’t receive enough oxygen because of your heart’s decreased ability to pump blood.

You may have difficulty catching your breath or feel a tightness in your chest. In severe cases, it can feel as if you’re suffocating. Call your doctor and seek medical attention as soon as possible if you experience this.

If you have symptoms of high potassium, contact your doctor immediately. A blood test can confirm a high potassium blood level, at which point your doctor will discuss your treatment options.

For some people, reducing high potassium involves eating a low potassium diet and limiting or avoiding certain types of foods. Your doctor might refer you to a dietitian who can develop a meal plan for you.

Along with a low potassium diet, your doctor may prescribe a diuretic to stimulate urination so you can release excess potassium.

They may also prescribe a potassium binder. This medication binds to extra potassium in your bowels. The potassium then leaves your body through your stool.

Your doctor will likely ask about your medical history, too. Some medications can cause potassium to accumulate in your blood. These include drugs to treat hypertension such as beta-blockers and ACE inhibitors.

Your doctor may need to lower your dose or adjust your medication to treat hyperkalemia. Stopping a potassium supplement can also keep your number within a healthy range, as well as treating dehydration.

Hyperkalemia can be a serious, life threatening medical condition. It’s important to keep your potassium intake within a moderate, healthy range.

Eating too little or too much can be dangerous, especially if you have diabetes or kidney disease. Ask your doctor or dietitian for advice on the right amount of potassium to protect your health.