This can be due to several reasons. If you purchased your P50 on the recommendation of a BR trained Dermal Therapist and use it as directed, it is generally completely harmless. Normally the skin takes some time to get used to the power of the P50 and is transient. If the flushing persists for more than 10 days, you should contact us for assistance. If, on the other hand, you bought it without a recommendation and you use other products outside the BR range, it is not impossible that the products clashed. Then we recommend that you contact us for a consultation and stop using it in the meantime.