Skin itching caused by tumors is generally stubborn and persistent, but there are no visible symptoms on the surface of the skin. This is because the biological factors released by tumor cells stimulate the surrounding nerves, leading to itching. For example, malignant lymphomas, cancers of the external genitalia, and cancers in female patients all exhibit itching during their progression.

Beyond skin itching, some patients may experience varying degrees of skin damage, including the appearance of erythema, blisters, or erosion. If these areas become infected, they can lead to skin breakdown and exudation. In addition to these symptoms, some patients may also experience skin thickening and scaling, as well as itching of the nose, anus, and genitals. There are many types of tumors that can cause itching, such as tumors on the forehead, rectum, colon, vagina, cervix, prostate, etc. Therefore, if a patient experiences symptoms of skin itching, it is crucial to maintain proper skin cleanliness promptly.