There is no such thing as a precursor to any disease when you feel itchy on your body. Itchy body may be peripheral neuritis, seborrheic dermatitis, eczema, ringworm and other diseases caused by the doctor’s advice, scientific treatment. 1. Peripheral neuritis: In case of peripheral neuritis, the symptoms of itchy skin can appear due to nerve inflammation caused by various factors. 2. Seborrheic dermatitis: due to immune factors, Malassezia infection and other triggers of sebum secretion, sebum clogging pores can lead to skin inflammation, so the phenomenon of itching. 3. Eczema: Eczema is a kind of skin inflammation triggered by many internal and external factors such as allergy, heredity, chronic diseases, etc. Eczema can also appear red spots and pimples with itching phenomenon. 4. Ringworm: when the skin is infected by fungi, fungal stimulation of the skin can also trigger itchy skin. Itchy and persistent phenomenon, please consult a doctor in time to find out the cause and follow the doctor’s instructions for treatment.