<s>[INST] Hi I have been diagnose with high red blood cell count.  When I wanted to donate blood I have been told that my pulse is higher than 100 and can not donate blood.  I been to the doctor how also said my pulse rate is high, he done test on my thirod which was negative and said everything look fine  I am also suffering with low blood pressure and high colestrol.  Must I worry? [/INST] May I know your age?smoking? Weight high cholesterol is certainly a risk factor for cardiac disease, so you should consume low fat and sugar diet along with regular exercise. Sometime someone's low blood pressure may be normal for that person unless he is suffering from severe heart disease which is not your case. High pulse rate may be low oxygen level in the blood. So get oxygen levels tested. Do you have any sleep related problems like snoring or interrupted sleep, anxiety problem etc </s>