Before chest pain begins, these subtle signs could point to high cholesterol

You can have dangerously elevated levels coursing through your bloodstream right now and feel absolutely fine. No chest pain. No shortness of breath. No warning lights on your internal dashboard. It just quietly does its damage, thickening your arteries, clogging your vessels, setting the stage for a heart attack or stroke years down the line.

The scariest part? Most people don't realize they have it until something goes catastrophically wrong.

According to the latest data from the National Health and Nutrition Examination Survey (August 2021–August 2023), 11.3% of adults aged 20 and older in the United States have high total cholesterol. That's nearly 25 million people walking around with cholesterol levels above 240 mg/dL, the threshold for high cholesterol. The numbers spike dramatically with age—16.7% of adults in their 40s and 50s are affected—but here's what should genuinely worry younger people: you can start developing high cholesterol as early as your 20s or 30s, long before you'd ever expect to have such a "middle-aged" problem.
​Hantavirus warning: US CDC advises not to use vacuum cleaners to clean rat droppings; here's why​
Dr. Ashish Kumar Govil, Associate Director of Interventional Cardiology at Max Super Speciality Hospital in Noida, explains why early detection matters so much. "Although cholesterol can start developing as early as age 20 or 30, it is frequently associated with ageing. It can begin to develop in the body without causing any noticeable symptoms until it leads to serious conditions such as heart disease or stroke. For this reason, it is extremely important that people learn about their cholesterol as early as possible and receive the appropriate testing at regular intervals."

Here's something most people don't know: your eyes can reveal what's happening inside your arteries. Look in the mirror. Do you notice a grayish-white ring around the colored part of your eye? That's called corneal arcus, and it's one of the most visible warning signs of high cholesterol that's been hiding in plain sight.

"Even though most people do not notice these symptoms, there are some physical changes that may serve as a warning sign that high cholesterol is present," Dr. Govil says. "The physical signs may include xanthomas, fatty yellow spots located under the skin, especially around the eyes, elbows, and knees and corneal arcus, greyish-white circles around the iris of the eye."

A 2021 study published in the Journal of Translational Medicine examined 250 patients with familial hypercholesterolemia, a genetic form of high cholesterol, and found that those with physical signs like tendon xanthomas and corneal arcus showed significantly higher rates of coronary artery disease. The study noted that "corneal arcus in people less than 50 years of age should be regarded as an indicator of hyperlipidemia," essentially saying if you're young and you see that ring around your eye, don't ignore it. Get tested immediately.

The reason these physical manifestations appear is fascinating from a medical standpoint. Corneal arcus happens because cholesterol and lipoproteins leak from blood vessels in the eye and accumulate in the cornea itself. It's literally your body telling you there's too much cholesterol circulating. The deposits consist mostly of low-density lipoprotein (LDL)—the bad cholesterol that builds up in your arteries.

Xanthomas are another telltale sign, and they're harder to miss. These are firm, yellowish bumps that appear under the skin, most commonly around the eyelids (where they're called xanthelasmas), on the elbows, knees, and Achilles tendons. They're essentially cholesterol deposits that have nowhere else to go, so they accumulate in your skin.

Recent research in 2024 and 2025 found that when xanthomas appear in younger patients. One case study from China documented a 12-year-old boy with xanthomas across his fingers, hands, elbows, knees, and buttocks, whose total cholesterol level reached 752.1 mg/dL. He had a family history nobody was checking.

The concerning thing about xanthomas is that many people assume they're just benign skin bumps. They're not. "Many people will have no visible signs, but these changes should not be ignored," Dr. Govil emphasizes.

For younger people, the culprits are usually behavioral. Dr. Govil points to what he sees in his practice: "For younger individuals, even when their health appears to be good, early signs of high cholesterol are often linked to lifestyle choices. These include an excessive amount of processed and high-fat foods in the diet, a lack of physical activity, smoking and excess stress."

The data backs this up. Recent surveys show that younger adults with high cholesterol tend to share common patterns—sedentary jobs, processed food diets, and stress. Add genetic predisposition on top of that, and you've got a recipe for early cardiovascular disease.

"Additionally, obesity, type 2 diabetes, and a family history of high cholesterol can all increase the likelihood that a younger person will develop high cholesterol as well," Dr. Govil notes. If your parents had high cholesterol, you're significantly more likely to develop it too. That's not an excuse to give up—it's a reason to be vigilant.

Here's where things get urgent. By the time your heart starts sending distress signals, the damage might already be significant.

"Some of the very first effects that present on the heart and blood vessels could include feelings of fatigue, shortness of breath, and mild chest pains," Dr. Govil warns. These aren't dramatic symptoms. You might chalk up fatigue to poor sleep or shortness of breath to being out of shape. But if these symptoms emerge suddenly or without explanation, they could be your heart struggling against clogged arteries.

The problem is these symptoms only appear after your cholesterol has already been damaging your arteries for years. This is why waiting for symptoms is a losing strategy.
Read also: 7 food that people should avoid for kidney health​

There's no way around it: the only way to know your cholesterol status is through blood work.
"The only way to accurately determine whether an individual has high cholesterol is through a lipid profile test," Dr. Govil states definitively. A lipid profile shows your total cholesterol, LDL (bad cholesterol), HDL (good cholesterol), and triglycerides. These numbers tell the real story.
Health guidelines recommend that healthy adults get their cholesterol checked every 4 to 6 years starting at age 20. If you have a family history, if you're overweight, if you smoke, or if you have any of the physical signs mentioned above—get tested now. Don't wait.