❤️ Heart Health
Signs of High Cholesterol — Symptoms, Causes & What to Do (2026)
High cholesterol rarely causes symptoms — but these warning signs may appear. Learn causes, risk factors, and how to lower cholesterol naturally. Updated January 2026.
Key Takeaways
- High cholesterol has no symptoms in most cases — it is detected only through a blood test
- Xanthomas (fatty deposits under skin) are the one visible sign in severe familial hypercholesterolaemia
- Total cholesterol above 5.0 mmol/L (190 mg/dL) warrants medical attention
- 1 in 3 UK adults and 38% of US adults have high cholesterol
- Diet and lifestyle changes can reduce LDL by 10–30% without medication
In This Article
Why High Cholesterol Is Called the "Silent Killer"
Unlike high blood pressure or diabetes, elevated cholesterol produces no physical symptoms in the vast majority of people. You cannot feel high cholesterol. There is no pain, no obvious warning signal. It builds up quietly in artery walls over years — and the first "symptom" for many people is a heart attack or stroke.
This is why routine cholesterol screening is so important. The NHS recommends cholesterol testing for all adults over 40, and sooner if there is a family history of heart disease or familial hypercholesterolaemia.
38%
of UK adults have total cholesterol above 5.0 mmol/L
50%
of people with high cholesterol have no idea they have it
3×
higher heart attack risk with untreated high LDL for 10+ years
The One Visible Sign: Xanthomas
In rare cases of familial hypercholesterolaemia (FH) — a genetic condition causing extremely high cholesterol — visible signs do appear. These include:
- Xanthomas: Yellowish, fatty deposits that appear under the skin, particularly around the Achilles tendon, knuckles, and knees
- Xanthelasma: Yellowish plaques that form on or near the eyelids — the most common visible sign
- Corneal arcus: A grey-white ring around the iris of the eye — more significant in people under 45
These signs are present in familial hypercholesterolaemia, which affects approximately 1 in 250 people. If you notice these, request a cholesterol test urgently.
Risk Factors You Can Control
- Diet high in saturated fat: Butter, fatty meat, full-fat dairy, coconut oil, palm oil directly raise LDL
- Physical inactivity: Exercise raises HDL and lowers triglycerides
- Obesity: Particularly visceral abdominal fat raises LDL and lowers HDL
- Smoking: Damages HDL and causes LDL to adhere more readily to artery walls
- Excessive alcohol: Raises triglycerides significantly
- Type 2 diabetes: Associated with high triglycerides and low HDL
Risk Factors You Cannot Control
- Age: Cholesterol rises naturally with age as the liver becomes less efficient at clearing LDL
- Genetics: Familial hypercholesterolaemia (FH) causes very high LDL from birth
- Sex: Before menopause, women typically have lower LDL; after menopause, LDL often rises to match or exceed men
- Ethnicity: People of South Asian descent have higher cardiovascular risk at lower cholesterol levels
ℹ️ Who Should Get a Cholesterol Test?
UK NHS: Everyone over 40 as part of NHS Health Check. USA CDC: All adults 20+ every 4–6 years; more frequently if at risk. Anyone at any age with: family history of heart disease or FH, obesity, diabetes, high blood pressure, visible xanthomas or xanthelasma.Understanding Your Cholesterol Numbers
| Measure | Optimal (UK) | Optimal (USA) | High Risk |
|---|---|---|---|
| Total cholesterol | Below 5.0 mmol/L | Below 200 mg/dL | Above 6.2 / 240 |
| LDL cholesterol | Below 3.0 mmol/L | Below 116 mg/dL | Above 4.0 / 155 |
| HDL cholesterol | Above 1.0 (M) / 1.2 (F) | Above 40 (M) / 50 (F) | Below these values |
| Triglycerides | Below 1.7 mmol/L | Below 150 mg/dL | Above 2.3 / 200 |
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Frequently Asked Questions
Can I feel high cholesterol?▼
No. High cholesterol has no physical symptoms in the vast majority of people. Only in rare, severe cases (familial hypercholesterolaemia) do visible signs like xanthomas appear. The only reliable way to know your cholesterol level is a blood test.
At what age should I get a cholesterol test?▼
The NHS recommends testing as part of the NHS Health Check for adults 40–74 every 5 years. The American Heart Association recommends all adults 20+ be tested every 4–6 years, and more frequently if at risk. Anyone with a family history of early heart disease should be tested earlier.
Can high cholesterol be reversed?▼
Yes — lifestyle changes including dietary modification, exercise, and weight loss can meaningfully reduce LDL. The Portfolio Diet has been shown to reduce LDL by up to 30% — comparable to low-dose statin medication. However, some people have genetic forms of high cholesterol that require medication regardless of lifestyle.
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⚕️ Medical Disclaimer: This article is for informational and educational purposes only. Not a substitute for professional medical advice. Always consult a qualified healthcare professional before making changes to your health routine.
JO
Dr. James Okafor, MD, FACC
WellCalc Medical Contributor
All WellCalc articles are written and reviewed by qualified healthcare professionals following NHS, AHA, WHO, and current clinical guidelines.