High cholesterol is often called a silent problem because most people do not feel anything when their cholesterol levels rise. In fact, high cholesterol usually has no symptoms, and a blood test is the only reliable way to know your numbers. Mayo Clinic and the CDC both explain that cholesterol testing is the real way to detect high cholesterol, not symptoms alone.
But there is an important detail many people miss: even though high cholesterol itself may not cause obvious symptoms, long-term high LDL cholesterol can contribute to plaque buildup inside the arteries. Over time, this plaque may narrow blood vessels, reduce blood flow, or sometimes rupture and form a blood clot. That clot may increase the risk of a heart attack or stroke.
So when people talk about “cholesterol warning signs,” they are usually talking about signs that may appear when cholesterol has already affected blood vessels, the heart, the brain, the legs, or the skin.
Here are 9 possible warning signs you should know.
1. Yellow Patches Around the Eyelids
Small yellowish patches near the inner corners of the eyes may sometimes be linked with cholesterol deposits. These are often called xanthelasma. They are not always dangerous by themselves, but they can be a reason to check cholesterol levels, especially if they appear suddenly or if you have a family history of high cholesterol or heart disease. NHS Wales describes xanthelasmas as yellow cholesterol deposits near the inner corner of the eye.
If you notice yellow patches near your eyelids, do not try to remove or treat them at home. Ask a healthcare professional whether you need a lipid blood test.
2. Fatty Lumps on Tendons, Knuckles, Knees, or Ankles
Some people with inherited high cholesterol, especially familial hypercholesterolemia, may develop fatty lumps called tendon xanthomas. These can appear on the Achilles tendon, knuckles, or knees. NHS Wales explains that tendon xanthomata are cholesterol deposits that show up as fatty lumps in areas such as the Achilles tendons, knuckles, or knees.
These signs are not common in everyone with high cholesterol, but when they appear, they should not be ignored.
