Over time, cholesterol-containing plaque may narrow arteries and make them less flexible. This process, known as atherosclerosis, can affect blood vessels supplying the heart, brain, and legs.
Possible complications include:
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Coronary artery disease
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Angina, or chest discomfort caused by reduced blood flow to the heart
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Heart attack
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Peripheral artery disease
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Ischemic stroke
These complications develop through complex processes involving cholesterol, inflammation, blood pressure, smoking, diabetes, genetics, and other factors. High cholesterol is an important contributor, but it is not the only cause.
The most important point is that a person can have dangerously elevated LDL cholesterol while feeling completely healthy. Waiting for symptoms before checking cholesterol can therefore delay prevention.
The US Centers for Disease Control and Prevention explains that a simple blood test is needed to identify unhealthy cholesterol levels.
Source: https://www.cdc.gov/cholesterol/testing/index.html
1. Chest Tightness or Pressure That Wakes You From Sleep
Chest discomfort is one of the most important symptoms to take seriously, especially when it is new, persistent, or accompanied by shortness of breath.
Some people describe it as pressure, squeezing, heaviness, fullness, burning, or a sensation that something is pressing against the chest. The discomfort may spread to the arms, back, neck, jaw, or upper abdomen.
In certain circumstances, these symptoms can be associated with coronary artery disease. When the arteries supplying the heart become narrowed, the heart muscle may not receive enough oxygen-rich blood during periods of increased demand. This can lead to angina.
Chest discomfort may occur during physical activity, emotional stress, or occasionally at rest. Symptoms that develop at night should not automatically be attributed to sleeping position, indigestion, or anxiety.
However, chest tightness while lying down is not a specific sign of high cholesterol. Other possible explanations include acid reflux, respiratory conditions, muscle strain, anxiety, and heart failure. A healthcare professional must assess the overall pattern of symptoms and the person's medical history.
When chest discomfort becomes an emergency
Seek emergency medical care if chest pressure is severe, lasts more than a few minutes, repeatedly returns, or occurs with symptoms such as:
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Difficulty breathing
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Cold sweating
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Nausea or vomiting
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Faintness or sudden weakness
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Pain spreading to the arm, back, neck, or jaw
Do not wait until morning to seek help if these warning signs occur during the night. Heart attacks do not always begin with dramatic pain, and symptoms can come and go.
People experiencing possible heart attack symptoms should contact their local emergency medical service rather than driving themselves to the hospital.
Source: https://www.heart.org/en/health-topics/heart-attack/warning-signs-of-a-heart-attack
Why cholesterol testing matters
A person who experiences chest discomfort may need urgent evaluation for heart disease, but the symptom itself cannot establish whether cholesterol is elevated.
Doctors may recommend an electrocardiogram, blood tests, and other investigations depending on the circumstances. A lipid profile can then help assess cholesterol-related risk and guide long-term prevention.
The goal is not simply to identify high cholesterol. It is to determine whether a person has an underlying cardiovascular condition and how to reduce the risk of future complications.
2. Persistent Numbness, Tingling, or Cold Feet at Night
Tingling in the hands or feet is common, especially after sleeping in an awkward position. Temporary pressure on a nerve can interrupt normal sensation and produce the familiar “pins and needles” feeling.
In most cases, the sensation improves after changing position.
Persistent or recurring numbness, however, deserves more attention. Depending on its location and associated symptoms, it may be related to nerve compression, diabetes, vitamin deficiencies, medication effects, or problems affecting blood circulation.
The connection between cholesterol and circulation
When plaque accumulates in arteries supplying the legs, blood flow can become restricted. This condition is called peripheral artery disease, or PAD.
PAD can cause symptoms such as:
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Pain or aching in the legs while walking
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Discomfort that improves after resting
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Coldness in one foot or leg compared with the other
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Changes in skin color
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Slow-healing sores on the feet
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Numbness or weakness in the legs
Some people have few noticeable symptoms, particularly in the early stages.
Because elevated LDL cholesterol contributes to atherosclerosis, it can increase the risk of PAD. Nevertheless, cold feet or tingling alone cannot determine whether someone has narrowed arteries or high cholesterol.
Other causes, including diabetes-related nerve damage, Raynaud’s phenomenon, and pressure on nerves during sleep, may produce similar sensations.
When should you seek medical advice?
Arrange a medical appointment if numbness persists, keeps returning, affects your ability to walk, or occurs alongside changes in foot temperature, color, or skin condition.
Sudden numbness or weakness affecting one side of the body, particularly with facial drooping, difficulty speaking, or sudden vision problems, requires emergency assessment because it may indicate a stroke.