In most cases, a cold does not cause an increase in blood pressure, except in special cases. A cold is mainly due to a decrease in the immunity of the body and infection by common viruses, bacteria and other pathogens that cause an inflammatory response in the upper respiratory tract, which generally does not affect blood pressure and does not lead to an increase in blood pressure. Some patients have a cold caused by infection with hemolytic streptococcus, which leads to complications of acute glomerulonephritis, which can cause an increase in blood pressure and is accompanied by proteinuria, hematuria, and edema of the lower extremities and eyelids, which are mainly caused by complications of the cold and can lead to an increase in blood pressure.