Cancer is a complex disease that often develops silently in its early stages. Because many cancers don’t cause noticeable symptoms until they have advanced, recognizing early warning signs is crucial for early detection and better treatment outcomes. While not all symptoms indicate cancer, certain changes in the body should never be ignored. Below are ten warning signs that could suggest the presence of cancer.

1. Unexplained Weight Loss

Unexpected and abrupt weight loss may be a precursor to cancer. If you lose more than 10 pounds (4.5 kg) without changes in your diet or exercise habits, it could be a signal that something is wrong. Many cancers, including those of the stomach, pancreas, esophagus, and lungs, can cause significant weight loss as the body uses more energy to fight the disease or as the cancer interferes with normal metabolic processes.

2. Persistent Fatigue

While feeling tired occasionally is normal, persistent fatigue that doesn’t improve with rest could be a sign of an underlying health issue, including cancer. Cancers like leukemia, colon cancer, or stomach cancer can cause overwhelming fatigue, as the body diverts energy to fighting the disease. If you find yourself constantly exhausted despite adequate sleep, it’s important to consult a healthcare professional.

3. Changes in Skin

Certain changes in the skin can indicate skin cancer, but other cancers can also cause noticeable skin changes. Watch for new moles, sores that don’t heal, or changes in the size, shape, or color of existing moles. Additionally, other forms of cancer can cause skin darkening, yellowing (jaundice), or itching. These changes should not be ignored, especially if they appear suddenly or worsen over time.