The Global Cancer Organization estimates that on average, Vietnam detects 180,000 new cancer cases each year.

According to Aboluowang, a 48-year-old man in China was diagnosed with late-stage lung cancer.

Doctors pointed out the first mistake: the patient’s body had already shown abnormal warning signals for more than three months, but he completely ignored them.

The patient simply thought he was experiencing aftereffects of a cold.

“He had a cold more than three months ago, and after that he constantly had a dry cough, but assumed it was just a lingering symptom,” the doctor shared.

The second mistake was that the patient had smoked for a long time but never went to the hospital for a checkup. Information revealed that the man had started smoking at the age of 18 and had a 30-year history of smoking.

Lung damage and smoking are the main causes of lung cancer.

From this case, doctors advised that lung cancer often gives off many warning signals once it appears. Therefore, people need to pay attention to the following symptoms:

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1. Frequent Headaches

Tumors may develop in the brain. Some are primary tumors such as gliomas, meningiomas, or other malignant intracranial tumors. Others are metastases from cancers such as lung cancer, colorectal cancer, stomach cancer, or breast cancer.

Regardless of whether a tumor is primary or metastatic, if it is in the head, it can cause headaches. Persistent or worsening headaches should be examined promptly.

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2. Persistent Dry Cough

The earliest symptom of lung cancer is not chest pain, coughing up blood, or shortness of breath, but rather a persistent dry cough. Unfortunately, this symptom is often overlooked or mistaken for a lingering cold, allergies, or bronchitis.

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3. Prolonged Abdominal Pain

The abdomen houses many vital organs, including the liver, stomach, gallbladder, pancreas, small intestine, and colon.

Cancer in any of these organs can cause abdominal pain, which typically worsens as the tumor grows. In some cases, patients need painkillers just to endure it.

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4. Unexplained Weight Loss

If you are not intentionally losing weight but experience sudden weight loss without a clear reason, pay close attention. Cancer is one of the most common causes of unexplained weight loss.

As cancer develops, it consumes large amounts of nutrients, leading to weight loss. This is also why patients in advanced stages often experience cachexia (severe wasting).

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5. Fatigue

Cancer can cause general fatigue for many complex reasons. Some cancers may cause anemia due to blood loss or poor nutrition, leading to tiredness.

Other cancers can reduce appetite and cause weight loss, also resulting in fatigue. Additionally, cancer can disrupt sleep, further contributing to exhaustion.

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6. Frequent Minor Illnesses

Cancer can cause abnormal declines in immunity. When the immune system weakens, the body’s defense barrier becomes less effective.

At that point, surrounding bacteria and viruses can more easily invade through the respiratory tract, digestive system, or urinary tract, often causing recurrent infections.

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7. Loss of Appetite

When cancer invades, it releases toxins that suppress appetite, making you lose interest in even your favorite foods.

Over time, cancer often metastasizes. Whether it is lung cancer, breast cancer, stomach cancer, or colorectal cancer, malignant tumors can spread to the liver—the body’s largest digestive gland. Liver metastasis can also cause abnormal loss of appetite.

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3 Warning Signs of Cancer That May Appear in the Neck

If people pay close attention to changes in their bodies, they may detect cancer early. When cancer cells exist, many parts of the body “send signals,” and the neck is one of the areas most likely to show symptoms, yet it is often ignored.

Doctors advise that if unusual signs appear in the neck, people should seek medical attention immediately.

1. Skin Discoloration in the Neck

This may be a sign of liver or stomach cancer. Normally, healthy skin is evenly colored. But if the skin on the neck gradually darkens, it may be due to toxins accumulating in the body because organs such as the liver or stomach are not functioning well.

2. Swollen Lymph Nodes in the Neck

Lymph nodes under 1 cm that are soft, mobile, painless, and well-defined are usually safe. But if lymph nodes grow larger than 1 cm, feel hard, painful, fixed, and have unclear borders, this could indicate early cancer or lymphoma in the neck and requires immediate examination.

3. Pus-Filled Pimples Around the Neck

This may be caused by active cancer cells. If pimples around the neck appear red, inflamed, itchy, or filled with pus, it may be a warning sign of cancer activity inside the body.

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Habits That Reduce Cancer Risk

The immune system is the body’s primary defense against cancer cells. If strong, it can destroy abnormal cells before they form tumors.

Healthy habits that help lower cancer risk include:

• Going to bed early and getting 8 hours of sleep daily. The body repairs and detoxifies itself between 11 p.m. and 3 a.m. Lack of sleep may weaken the body and increase health risks.

• Having regular annual health checkups. Early detection allows for timely treatment and prevention of disease progression.

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👉 In summary, if you notice persistent symptoms such as headaches, dry cough, prolonged abdominal pain, unexplained weight loss, fatigue, frequent minor illnesses, or loss of appetite—and especially abnormal changes in the neck—you should seek medical care promptly. Early detection greatly improves the chances of successful treatment.