There are several symptoms found with kidney failure, including easy bruising, weakness, darkening skin, impotence, bleeding gums, sore tongue, muscle aches, depression, "burning" feet at night, insomnia, restless legs, muscle twitches, sudden "improvement" in diabetes (less insulin may be needed), sudden worsening of hypertension control, headaches, high blood pressure, nocturia (passage of large amounts of urine at night), frothy urine, limited amounts of urine, flank pain, seizures, drowsiness, ankle swelling, poor memory, poor appetite, excessive thirst, nausea, vomiting, hiccups, loose stools, dry furry tongue, leg cramps, bone pain, altered taste sensation, itchy skin, shortness of breath and low-grade fever.