Our hands can reveal surprising clues about our health. Subtle changes may point to serious issues like heart disease or cancer.

When fingertips become rounded and nails curve downward, forming “drumstick-like fingers,” it could indicate lung or heart conditions. “The most common cause of clubbing is lung cancer,” but it may also relate to cystic fibrosis, heart defects, or infections. It’s not contagious but should be checked by a doctor.

Swelling in the fingers can result from fluid retention due to heart failure or high cholesterol. “High cholesterol is a significant risk factor for cardiovascular diseases,” and can cause xanthomas—cholesterol buildup that enlarges joints. Persistent swelling may signal circulation problems or increased stroke risk.

If you notice bruises on your fingers without injury, it could indicate leukemia, where abnormal white blood cells “interfere with normal blood clotting.” Other signs include fatigue, pale skin, and frequent infections.

Raynaud’s disease can make fingers turn blue or purple due to reduced blood flow. Though often harmless, it may also suggest lupus or Crohn’s disease. “Your hands can reveal more than you think.” Changes like swelling, bruising, or clubbing deserve medical attention—early detection saves lives.