My potassium has tested at 5.4 on a range going to 5.2 twice. should i be concerned? what should be done?

High potassium?: Your potassium (k) level is not that high. High k may be due to chronic kidney disease, or addison's disease, . One less serious cause is due to rupture of red cells during the draw of a blood sample. For more info on high k levels see: http://www.Mayoclinic.Org/symptoms/hyperkalemia/basics/causes/sym-2005077. I would not worry about your k level. If you are, see a nephrologist for more help.