Possible causes include:

Cancer can alter metabolism and suppress appetite. However, weight loss is also common with thyroid disorders, diabetes, or stress.

If weight drops significantly without diet or exercise changes, consult a healthcare provider.

2. Persistent Fatigue That Doesn’t Improve with Rest

We all feel tired sometimes. But cancer-related fatigue is different.

It may feel:

Leukemia, colon cancer, and stomach cancer can cause chronic fatigue due to internal bleeding or immune system activation.3. Changes in Bowel Habits

Ongoing changes such as:

may indicate colon or rectal cancer.

Occasional digestive changes are common. But persistent patterns lasting more than two weeks require evaluation.

4. Persistent Cough or Hoarseness

A cough that lasts more than three weeks — especially if accompanied by:

Shortness of breath
may be associated with lung cancer.

Anatomy

Hoarseness lasting several weeks could indicate throat or laryngeal cancer.

Smoking increases risk, but non-smokers can also develop lung cancer.

Unexplained bleeding is always worth medical attention.

Examples include:

While infections and benign conditions can cause bleeding, unexplained or recurring episodes need evaluation.

One of the most recognized warning signs is a new lump.

HealthConditions

Common areas include:Breast

Testicles

Neck

Armpits

Groin

Not all lumps are cancerous. Many are cysts or benign growths.

Anatomy

However, any new mass that:

should be examined by a doctor.

Persistent trouble swallowing (dysphagia) may be linked to:

People may feel like food gets stuck or experience pain when swallowing.If swallowing issues persist beyond minor infections, seek evaluation.

Anatomy

Chronic indigestion that does not respond to typical treatments may indicate:

Early detection of melanoma dramatically improves outcomes.

Cancer