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Itchy muscles are a common sensation that can be caused by a number of factors. While it is not dangerous, it may be a symptom of another health issue. Muscle itching can be caused by a miscommunication between the brain and nerves throughout the body, known as neuropathic itch, or it can be a side effect of medication.
| Characteristics | Values |
|---|---|
| Sensation | Itch felt deep under the skin in the muscle tissue |
| Rash | Usually present without any rash or visible irritation |
| Prone to | Anyone, but certain conditions make people more prone to it |
| Common in | Runners |
| Related to | Neural health and pain |
| Cause | Nerves in the muscles sending the wrong signal |
| Cause | How nerves respond to increased blood flow during exercise and warm temperatures |
| Common during | Physical activity |
| Relieved by | Scratching |
| Symptom of | Underlying medical condition |
| Occurs with | Exercise |
| Occurs with | Pregnancy |
| Occurs with | Side effects of medication |
| Treatment | Depends on the specific cause |
| Dangerous | No |
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What You'll Learn
- Itchy muscles are not dangerous but may be a symptom of another health issue
- Itchy muscles are common during physical activity, especially running
- Itchy muscles can be a side effect of medication
- Itchy muscles can be a symptom of pregnancy
- Itchy muscles can be a symptom of an underlying medical condition, such as multiple sclerosis or shingles
Itchy muscles are not dangerous but may be a symptom of another health issue
Itchy muscles are not dangerous, but they may be a symptom of another health issue. Itchy muscles are a common sensation, particularly during physical activity, and are especially common in runners. They can also occur after exercise, due to increased blood flow to the muscles. This can cause the blood vessels in the muscles to stretch beyond what they're used to, waking up the nerves around them.
Scientists are studying the relationship between itch (also called pruritus) and neural health and pain. Itchy muscles are not actually muscle tissues that want to be scratched but nerves in the muscles sending the wrong signal. It may also be related to how nerves respond to increased blood flow during exercise and warm temperatures.
In some cases, itchy muscles can be a symptom of an underlying medical condition, such as multiple sclerosis or shingles. They can also occur during pregnancy or as a side effect of medication. If the feeling persists or recurs, you should talk to a doctor about any potential causes.
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Itchy muscles are common during physical activity, especially running
Itchy muscles are common, especially during physical activity, and are particularly associated with running. This sensation, known as pruritus, is often felt under the skin and is not always relieved by scratching. Itchy muscles can occur as a result of exercise, as a symptom of a medical condition, or as a side effect of medication. The itch is usually felt in the muscles being used during the activity. For example, "runner's itch" describes the itchy sensation in the legs that often occurs after running.
Itchy muscles are thought to be caused by the stretching of blood vessels in the muscles beyond what they're used to, which wakes up the nerves around them. During exercise, the body releases a chemical called histamine, which causes blood vessels to dilate and deliver oxygen to the muscles. One animal study found that mice have an important nerve receptor that links muscle contraction and signalling itch. Since the nerve signals that communicate pain are closely linked with the nerve signals for itch, itching muscles could be a way that the body processes stress from working out.
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Itchy muscles can be a side effect of medication
If you are experiencing itchy muscles, it is important to work with your doctor to identify the cause and find appropriate treatment. Treatment depends on the underlying cause, and when the symptom is a side effect of medication, other drugs might be available.
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Itchy muscles can be a symptom of pregnancy
Pregnancy hormones may be the cause, or the skin stretching over the bump. Itchy skin during pregnancy is common, with around one in four women and pregnant people experiencing it. It is also common to feel especially itchy around your belly and breasts as your skin stretches to accommodate their growth.
Intense itching of the abdomen, arms, and legs can be a sign that your body needs some attention. Itching in pregnancy can be a symptom of a more serious condition, such as intrahepatic cholestasis of pregnancy (ICP), a serious liver condition that needs medical care. It is not known what causes ICP, but it affects the normal process of bile acids flowing from the liver to the gut to digest food.
Other conditions that cause itching in pregnancy but are not specifically related to pregnancy include various diseases, such as renal, hepatic, and thyroid abnormalities, iron deficiency anaemia, malignancy, rheumatic diseases, drug reactions, diabetes, infestations, neurologic disorders, primary psychiatric disorders, and systemic infection such as hepatitis or HIV.
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Itchy muscles can be a symptom of an underlying medical condition, such as multiple sclerosis or shingles
Itchy muscles are a common sensation, particularly during physical activity. Itchy muscles are not dangerous, but they may be a symptom of an underlying medical condition, such as multiple sclerosis or shingles. Itchy muscles can also be caused by increased blood flow to the muscles during exercise, or by warm temperatures. This is because the blood vessels in the muscles are stretching beyond what they're used to, which wakes up the nerves around them.
Itchy muscles can also be caused by medication, or by pregnancy. In some cases, they may be a way that the body is processing stress from working out.
If the feeling persists or recurs, it's a good idea to talk to a doctor about potential causes.
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Frequently asked questions
Itchy muscles are not dangerous, but they may be a symptom of another health issue. Itchy muscles are common, particularly during physical activity, and are often felt under the skin.
Itchy muscles are caused by increased blood flow to the muscles, which wakes up the nerves around them. Itchy muscles could also be a way that your body is processing stress from working out.
You can try stress management techniques such as meditation and progressive muscle relaxation to calm your mind. Lightly massaging your itchy muscles can also help decrease uncomfortable sensations.
You should talk to a doctor about any potential causes if the feeling persists or recurs. Itchy muscles can be a sign of underlying medical conditions that affect the nervous system, such as multiple sclerosis or shingles.
Itchy muscles are common after exercise, especially cardio workouts like running and walking. If you are prone to itchy muscles, you may want to avoid these types of exercise or try to manage your stress levels.
