On the other hand, there are some conditions that may cause faulty information or data from pulse oximeter readings. These include the presence of nail polish and other cosmetics, cold extremities and poor blood circulation. Activities that directly or indirectly influence the bodily mechanism, such as sleeping or exercise, can also affect the readings of oximeter and can cause confusion on the results. Thus, the patient must have a viable health condition in order to attain the most accurate results possible.