Most persistent coughs are not caused by cancer. Asthma, reflux, allergies, smoking, infections, and medications are common causes.
But persistence is the key reason to get checked.
9. Hoarseness or Voice Changes
A voice that remains hoarse for an extended period can result from reflux, allergies, vocal strain, infections, or smoking.
In some cases, persistent hoarseness can be associated with conditions affecting the throat, larynx, or nearby structures.
If your voice remains unusually hoarse without an obvious explanation, particularly if you also have difficulty swallowing or breathing, seek medical advice.
10. Difficulty Swallowing
Difficulty swallowing, known as dysphagia, can have many causes.
Acid reflux, neurological conditions, esophageal disorders, and infections can all contribute to swallowing problems.
However, persistent or progressively worsening difficulty swallowing should be evaluated because it can occasionally be associated with cancers of the throat or esophagus.
11. Persistent Indigestion or Abdominal Discomfort
Occasional indigestion is extremely common.
But persistent indigestion, unexplained abdominal discomfort, early fullness, or recurring bloating may warrant investigation—particularly when accompanied by weight loss, vomiting, or changes in appetite.
These symptoms are much more commonly caused by benign gastrointestinal conditions, but persistent symptoms should not simply be ignored.
12. Changes in Skin Lesions or Moles
One of the most recognizable warning signs of possible skin cancer is a new or changing mole or skin lesion.
Look for changes in:
• Asymmetry
• Border
• Color
• Diameter
• Evolution over time
A lesion that changes, repeatedly bleeds, crusts, itches, or fails to heal should be examined by a healthcare professional.
13. A Wound That Does Not Heal
Most minor cuts and sores gradually heal.
A wound that does not heal normally, repeatedly opens, bleeds, or develops unusual changes deserves medical evaluation.
Persistent sores can occur for many reasons, including poor circulation, diabetes, infection, and chronic irritation. Certain skin cancers can also present as non-healing lesions.
14. Unusual Night Sweats
Waking up occasionally feeling warm is not necessarily concerning.
But repeated, drenching night sweats without an obvious environmental explanation can occur with infections, hormonal changes, medications, and other conditions.
They can also occur with certain cancers, including some blood cancers.
Night sweats alone cannot diagnose cancer, but persistent unexplained episodes deserve medical attention.
15. Recurrent or Unexplained Fever
Fever usually indicates that the immune system is responding to something, most commonly an infection.
Certain cancers can also cause persistent or recurrent fever.
If you repeatedly develop fevers without a clear cause, particularly alongside unexplained weight loss, fatigue, or enlarged lymph nodes, speak with a healthcare professional.
16. Persistent Swollen Lymph Nodes
Lymph nodes can become enlarged when your immune system responds to an infection.
For example, swollen lymph nodes in the neck commonly occur during respiratory infections.
But a lymph node that remains enlarged, continues growing, feels unusually firm, or appears without an obvious infection should be evaluated.
17. Unexplained Bruising or Bleeding
Frequent unexplained bruising can occur because of medications, nutritional deficiencies, liver problems, platelet disorders, or other conditions.
In some cases, unusual bruising or bleeding can be associated with disorders affecting blood cells or bone marrow.
If bruises suddenly become much more frequent without an obvious explanation, medical testing may be appropriate.