Kidney disease commonly refers to "chronic kidney disease", meaning the kidneys are in a damaged state for more than three months. Kidney disease is characterized by reduced capability of the kidneys primary function, which is the cleaning of blood. (also see the Mondo disease ontology purl: https://www.ebi.ac.uk/ols/ontologies/mondo/terms?short_form=MONDO_0005300.)

Patients with progressed kidney disease can experience any of the following symptoms: Nausea, shortness of breath, dry skin, swelling of some extremities (especially feet and ankles). This list isn't complete.
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