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Other possible warning signs include a sore that repeatedly bleeds, a wound that does not heal, or a persistent scaly or crusted patch.
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Skin changes have many possible explanations, including eczema, infections, and benign growths.
A useful habit: Examine your skin periodically and report a changing mole or persistent unusual lesion to a healthcare professional. Do not wait for a spot to become painful.
5. A Persistent Cough or Hoarse Voice
A cough that lasts for several weeks, changes in character, or gradually worsens should be assessed, especially in someone who smokes or has a history of smoking.
Lung cancer may cause a persistent cough, breathlessness, chest discomfort, or coughing up blood. Some people notice that a cough they have had for years becomes different.
A hoarse voice that does not improve can sometimes be associated with cancers affecting the larynx or nearby structures.
However, respiratory infections, allergies, asthma, acid reflux, and other conditions are much more common causes of these symptoms.
When to seek help: Arrange medical evaluation for a persistent or worsening cough or unexplained hoarseness. Coughing up blood requires prompt medical assessment, even if the amount is small.Relieve Pain
6. Blood in the Urine or Stool
Unexplained bleeding is one of the most important symptoms to take seriously.
Blood in the stool may appear bright red, dark red, or nearly black. It can sometimes be associated with colorectal cancer, although hemorrhoids, anal fissures, ulcers, and other digestive conditions can also cause bleeding.
Blood in the urine may be linked to bladder or kidney cancer, but urinary infections, kidney stones, and other conditions are also possible causes.
Bleeding may occur only once or intermittently, so its disappearance does not necessarily mean the underlying problem has resolved.
Do not ignore it: Contact a healthcare professional if you notice blood in your urine or stool. Seek urgent care for heavy bleeding, black tarry stools accompanied by weakness, fainting, or severe abdominal pain.
7. Persistent Changes in Bowel Habits
Occasional constipation or diarrhea is common. More concerning changes include a persistent alteration in how often you have bowel movements, the consistency of your stool, or the ease with which you pass it.
Colorectal cancer can sometimes cause ongoing constipation, diarrhea, narrower stools, or a feeling that the bowel has not emptied completely.
These symptoms can also result from irritable bowel syndrome, dietary changes, infections, medications, and other digestive disorders.
The key is to pay attention to a change that continues rather than assuming it is simply part of getting older.
When to seek advice: Discuss bowel changes that persist for several weeks, particularly if they occur with abdominal pain, anemia, blood in the stool, or unexplained weight loss.
8. Difficulty Swallowing
Having difficulty swallowing food or liquids is a symptom that deserves medical attention, particularly when it gradually becomes worse.
Some people first notice that solid foods seem to stick in the throat or chest. Later, swallowing softer foods or liquids may also become difficult.
Possible causes include acid reflux, inflammation, narrowing of the esophagus, neurological conditions, and cancers affecting the throat or esophagus.
Pain while swallowing, frequent choking, or unexplained weight loss can provide additional reasons for prompt evaluation.
What to do: Arrange a medical assessment if swallowing becomes persistently difficult. If food is stuck and you cannot swallow saliva or breathe normally, seek emergency assistance.
9. Persistent Abdominal Pain or Bloating
Bloating after a large meal is common. However, persistent abdominal swelling, discomfort, or a feeling of fullness that repeatedly occurs without a clear explanation should not be overlooked.Check Symptoms
Ovarian cancer can sometimes cause ongoing bloating, pelvic discomfort, difficulty eating, or feeling full quickly. Other cancers affecting the digestive system may cause abdominal pain, nausea, or changes in appetite.
Most bloating is not caused by cancer. Constipation, food intolerances, menstrual changes, and digestive conditions are common explanations.
The important distinction is whether symptoms are new, frequent, persistent, and different from your usual experience.
Seek medical advice if abdominal swelling or pain continues, particularly when accompanied by early fullness, urinary changes, or unexplained weight loss.
10. Changes in Breast Appearance or Feel
Breast cancer does not always begin with a noticeable lump. Changes in breast shape, size, skin, or the nipple can also be warning signs.
Possible changes include:
A new lump in the breast or underarm.
Skin dimpling or puckering.
Redness or swelling that does not resolve.
A newly inverted nipple.
Unusual nipple discharge, especially if bloody.
A persistent change in the shape or appearance of one breast.
Many breast changes are caused by hormonal fluctuations, infections, or benign conditions. Nevertheless, an unusual new change should be assessed rather than diagnosed at home.
Breast cancer can affect people of different ages and can occur in men as well as women.
Remember: Do not wait for pain to develop before seeking medical advice about a suspicious breast change.
11. Persistent Heartburn or Indigestion
Occasional heartburn after eating spicy, fatty, or large meals is common. Persistent indigestion, however, may deserve investigation when it is new, worsening, or different from your usual symptoms.
Some cancers of the stomach or esophagus can cause indigestion, nausea, discomfort after meals, or difficulty swallowing. Pancreatic cancer may also cause digestive symptoms, although these symptoms are nonspecific.
Much more common explanations include acid reflux, gastritis, ulcers, medication effects, and dietary factors.
Do not assume that long-lasting indigestion is harmless simply because antacids provide temporary relief.
Get medical advice if symptoms persist, particularly if they occur alongside vomiting, difficulty swallowing, unexplained weight loss, anemia, or reduced appetite. Chest pressure or pain with shortness of breath, sweating, or faintness may indicate a heart emergency rather than indigestion.Find Treatments
12. Frequent or Unusual Fevers and Night Sweats
Fever is usually associated with infections, but unexplained recurring fever can occasionally accompany cancers such as lymphoma or leukemia.