For example, cancers affecting bones may cause bone pain, while some cancers involving the abdomen or pelvis can cause persistent discomfort in those areas.
Persistent headaches can also have many causes, and in rare cases may be associated with problems affecting the brain.
The important message is not to assume that persistent pain is cancer, but rather to determine why it is happening.
5. Unusual Lumps or Swelling
Finding a lump does not automatically mean that it is cancer.
Many lumps are harmless and can be caused by cysts, infections, benign growths, or other conditions.
However, a new lump that persists, grows, becomes hard, or is otherwise unusual should be examined by a healthcare professional.
Particular attention should be paid to unexplained lumps in areas such as the breast or testicles.
A doctor may examine the lump and, if necessary, recommend additional tests to determine what it is.
Why These Signs Should Be Taken Seriously
Many diseases share similar symptoms.
That means that symptoms alone cannot diagnose cancer.
For example, tiredness may be caused by poor sleep or anemia, while unexplained weight loss can result from digestive problems, stress, hormonal conditions, or other illnesses.
Likewise, most lumps are not cancerous.
The reason doctors pay attention to persistent or unexplained symptoms is that identifying the underlying cause can sometimes allow a serious condition to be detected earlier.
