1. Unexplained weight loss.
Unintentional weight loss, especially of 5 kg or more, can be an early sign of cancer. This is common in cancers of the pancreas, stomach, esophagus, or lung.

2. Fatigue.
Unusual tiredness or weakness, even after a full night’s sleep, can be a sign of many cancers. Persistent fatigue may be due to the immune system fighting the cancer or to the cancer itself.

3. Pain.
Pain can sometimes be an early symptom of cancer, depending on its location. Persistent headaches, bone pain, or back pain should not be ignored.
4. Skin changes:
Skin changes, such as the appearance of new moles, lumps, or changes in the size or color of existing moles, may indicate skin cancer. Jaundice (yellowing of the skin) is also a sign of liver cancer.

5. Nodules or masses:
Any nodule or mass in the breast, testicles, lymph nodes, or soft tissues should be examined. Although not all nodules are cancerous, they can be early signs of many types of cancer.

6. Unexplained bleeding
Unexplained bleeding, such as coughing up blood, blood in the stool, or abnormal vaginal bleeding, may be a sign of lung, colon, or reproductive organ cancer.

7. Persistent cough or hoarseness
A persistent cough or hoarse voice may indicate lung, throat or laryngeal cancer.

8. Difficulty swallowing.
Difficulty swallowing or a sensation of food being stuck in the throat may indicate cancer of the esophagus, throat or stomach.

9. Changes in bowel or bladder transit
A sudden change in bowel transit (diarrhea, constipation or blood in the stool) or urinary problems (frequent urination, painful urination, blood in the urine) may signal cancer of the digestive or urinary system.