In recent years, the incidence and mortality rates of cancer have been rising, with the disease affecting increasingly younger people. Therefore, experts recommend that everyone learn to take care of their own health. The concerning reality is that not all cancers show clear symptoms in the early stages. By the time the disease is discovered, it is often already advanced, leaving patients regretting the lost opportunity for timely treatment.

Experts at Cancer Research UK have pointed out that, aside from nighttime, early morning is also when cancer symptoms often appear most noticeably. Pay close attention to the following 7 unusual signs upon waking up, which may be “a cry for help” from your body under attack by cancer:

1. Difficulty waking up
Getting up early or rising quickly has never been easy for everyone. However, if you consistently find it very hard to wake up in the morning, even after going to bed early and getting enough sleep, you should be cautious about cancer.

At night, cancer cells are highly active, exerting a strong impact on the body. Moreover, the immune system of cancer patients weakens significantly at night. During this time, many organs are forced to work overtime to resist cancer.

Some cancers also cause insomnia, poor sleep, pain, or shallow sleep. For example, bone marrow cancer leads to hypercalcemia, which makes the body unusually drowsy. As a result, mornings feel exhausting and it becomes hard to get up.

2. Fatigue
According to Cancer Research UK, fatigue is extremely common in people with cancer and can be one of the most troubling symptoms. Cancer-related fatigue can affect your physical, emotional, and mental state.

This type of fatigue often results from cancer cells depleting the body’s nutrient reserves to fuel their growth. This “nutrient theft” leaves the body without the resources it needs to replenish itself, resulting in overwhelming exhaustion.

The Cancer Center notes that fatigue can be even more pronounced in patients with blood cancers, as these originate in the bone marrow. The bone marrow is crucial because it produces red blood cells, which carry oxygen to different parts of the body.

3. Unusual bad breath
Many people experience morning breath, but it usually disappears after drinking water or brushing teeth. The cause can be poor digestion or oral health. However, persistent bad breath may also be a sign of cancer—especially when it does not improve after brushing.

Lung cancer and bronchial cancer often lead to varying degrees of cancer-related halitosis, caused by mucus accumulation in the lungs. In lung cancer, acid breakdown can also trigger bad breath. Stomach cancer may cause acid reflux, belching, and foul breath, while liver cancer disrupts detoxification, raising ammonia levels in the blood and resulting in bad breath and nausea upon waking.

4. Abdominal pain or headache
Frequent morning headaches or stomach pain can be linked to cancer, especially stomach cancer, liver cancer, or brain tumors.

According to Brain Tumour Research, headaches are one of the main symptoms of brain tumors. These headaches are typically more severe in the morning and may come with nausea and dizziness.

Similarly, liver and stomach cancers often reveal signs in the morning, when the body has just woken up and lacks energy. Pain in the upper right abdomen can indicate liver problems, while pain in the middle abdomen may signal stomach cancer.

5. Nausea and vomiting
Cancer Research UK emphasizes that morning nausea is a common symptom among cancer patients, particularly in advanced stages or during chemotherapy and radiation therapy. Studies show that 7 out of 10 cancer patients experience morning nausea.

It’s important to note that nausea may also result from medication side effects or other non-cancer conditions. However, persistent morning nausea is often seen as a warning sign of cancer, especially breast cancer.

According to Breast Cancer Now, nausea and fatigue in the morning may indicate breast cancer metastasis to the brain. Additionally, waking up and immediately vomiting is considered an early warning sign of liver or kidney cancer.

6. Abnormal urination or bowel movements
Feeling an urgent need to urinate immediately after waking, or frequent urination in the morning, may be signs of cancer—commonly bladder or kidney cancer. Cancer Research UK also warns that multiple myeloma can cause this, as the disease leads to hypercalcemia, which peaks in the morning. The body then tries to flush out excess calcium through frequent urination.

The appearance of urine and stool upon waking can also signal cancer. Healthy urine is pale yellow and clear. Foamy urine, blood in the urine, dark yellow or brown urine, or foul-smelling urine may indicate kidney, bladder, testicular, or liver cancer.

Similarly, frequent early-morning diarrhea or black, bloody stools warrant immediate medical attention, as they may be signs of stomach or intestinal cancer.