1.Unexplained Weight Loss

What it means: Losing more than 5 kg (10 lbs) without trying could be an early sign of cancer, especially cancers of the stomach, pancreas, esophagus, or lungs.
Why it happens: Cancer cells consume a lot of the body’s energy or change how the body processes food.

2.Fatigue (Extreme Tiredness)

What it means: Feeling tired all the time, even after rest, may point to leukemia, colon cancer, or stomach cancer.
Why it happens: Cancer uses up nutrients and energy; some cancers also cause internal bleeding (like in the digestive tract), leading to anemia and fatigue.

3. Fever or Night Sweats

What it means: Persistent or recurrent fever without infection may be related to blood cancers like lymphoma or leukemia.
Why it happens: Fever is your body’s way of fighting abnormal cells. In some cancers, it’s a response to cancer itself or to the body’s immune reaction.

4.Unusual Bleeding or Discharge

What it means: Bleeding between periods, blood in the urine or stool, or coughing up blood can be a red flag.
Why it happens: Tumors can erode blood vessels or surfaces in organs, leading to bleeding.

5.Persistent Pain

What it means: Ongoing pain (like a headache that won’t go away or bone pain) may be a sign of cancer in that area.
Why it happens: Cancer can press on nerves, bones, or organs, causing chronic pain.

6. Lumps or Thickening Under Skin

What it means: New lumps on the breast, testicles, lymph nodes, or soft tissues could indicate cancer.
Why it happens: Tumors or swollen lymph nodes can be felt as lumps under the skin.

7. Changes in Bowel or Bladder Habits

What it means: Long-term constipation, diarrhea, or change in stool shape may point to colon cancer; difficulty urinating or blood in urine may suggest prostate or bladder cancer.
Why it happens: Tumors can press on or grow into the intestines or bladder, changing how they work.

8. Shortness of Breath or Persistent Cough

What it means: A cough that doesn’t go away or gets worse, especially with blood, may suggest lung cancer.
Why it happens: Tumors in the lungs can block airways or irritate tissues, leading to coughing or breathing issues.

9. Hoarseness or Difficulty Swallowing

What it means: Persistent hoarseness or trouble swallowing may point to throat, esophageal, or thyroid cancer.
Why it happens: Tumors in these areas interfere with normal voice and swallowing functions.

10.Skin Changes

What it means: A mole that changes size, shape, or color, or a sore that doesn’t heal could be skin cancer (like melanoma).
Why it happens: Cancer cells grow abnormally, altering how skin looks and heals.

11. Persistent Bloating (especially in women)

What it means: Constant bloating could be a symptom of ovarian cancer.
Why it happens: Tumors or fluid buildup in the abdomen cause pressure and bloating.