What is the precursor to cancer and frequent colds?

Frequent colds are not a precursor to cancer. Frequent colds are mainly caused by low immunity and poor resistance. Cancer precursors are more common in the neck or corresponding areas found lumps, or patients show black stool, gastrointestinal bleeding, nasal bleeding, hematuria, may also show localized pain, such as abdominal pain. If the patient shows frequent colds, he should first adjust his diet, eat more foods rich in vitamins and proteins, drink more water, ensure good sleep, prevent emotional excitement, prevent fatigue and stay up late, and eat some immune-enhancing drugs.