Itchy skin without any signs is less likely to be AIDS, which is a sexually transmitted disease characterized by severe immunodeficiency caused by human immunodeficiency virus infection, and is mainly manifested by peripheral lymph node enlargement with fever, malaise, diarrhea, and so on. On the skin, seborrheic dermatitis, ichthyosis, and psoriasis can occur, which are usually more severe. Various infectious skin diseases such as herpes zoster, herpes simplex, and various fungal infections can also be present, as well as various skin tumors. Itchy skin is not a characteristic manifestation of AIDS, and if you suspect AIDS, you can have blood tests done to determine this. Itchy skin can be caused by many reasons, such as diabetes, liver and kidney disease can lead to itchy skin, visceral tumors can also cause itchy skin, need to be further clarified.