A device is described for reminding a patient suffering from ailments such as diabetes and high cholesterol levels, who performs daily blood tests, of the site of the last blood extraction, in the case where blood is drawn from one or more sites of each finger of the hands. The invention includes two disks, each having an inner face and an outer face, the inner face containing a representation of the opposite hand from the other. On each disk finger holes are punched in the vicinity of the fingers to represent the sites where blood is drawn. On the inner face of each disk is a red marker area which may be displayed under the finger hole on the opposite disk, corresponding to the last site where blood was drawn. When the user progresses from one hand to the other in his testing regime, the device is flipped over, and the outside face of the other disk is used to display the status of the site where blood has been drawn on a representation of the hand currently used.
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