Pronunciation: inâ²di-kÄâ²shÅ­n. Definition: The basis for initiation of a treatment for a disease or of a diagnostic test; may be furnished by a knowledge of the cause (causal indication), by the symptoms present (symptomatic indication), or by the nature of the disease (specific indication).
Anyhow, here is a list of some of the causes of itchy skin with no rash: 1  Dry skin. 2  Dry skin can be caused by cold weather and lack of moisturizing. 3  Scabies infection. 4  Poor blood circulation. 5  Iron deficiency. 6  Pregnancy. 7  Obstetric Cholestasis in pregnant women.
Various dermatologic conditions affecting the skin can cause itchiness and rashes, but only some are related to an allergy. There are many types of skin allergies and rashes that can cause itchiness and inflammation. However, not all rashes that itch are related to skin allergies. For example, insect bites and autoimmune conditions along with fungal, bacterial, and viral infections can all cause a rash to appear.