I received PRP under the eyes using a cannula. During the treatment, it did burn when it was being injected. Is this normal? As well, after the doctor was done injecting, he aggressively rubbed underneath my eyes because he said he didn’t want the PRP to coagulate. Would this rubbing cause damage to my delicate under eye skin? I’m wanting to get another treatment done, but I thought this technique was odd and the burning was abnormal. Please advise!