1. SKIN CHANGES

Some cancers may cause changes in skin color or texture, such as yellowing, darkening, or redness of the skin. They will either signal cancer or indicate any progression. Additionally, watch out for an increase in moles, freckles, or changes of warts color, shape, or size as the case is with skin cancer.

Also, some cancers share these symptoms, which indicate the progression of cancer to some degree. Excessive itching and hair growth can also be red flags for cancer.