There is often no specific clinical manifestation before cancer, and weakness, fever, and related site symptoms may occur.
Cancer is a serious malignant disease, which can be caused by a variety of factors such as gene mutation and environment. Non-specific clinical manifestations such as fatigue, fever, and unexplained weight loss may occur before the disease develops. Different cancers may have different symptoms according to the different parts of the disease.
For example, stomach cancer patients may have symptoms such as stomach discomfort and indigestion; colon cancer patients may have symptoms such as change of bowel habit and abdominal pain; breast cancer patients may have symptoms such as localized lumps and cellulite. Therefore, regular medical checkups can be conducted in daily life to detect precancerous lesions in time, and patients should go to the hospital in time when they feel unwell.