Flushing after taking Super Fildena, which contains sildenafil (a PDE5 inhibitor), occurs due to the drug's effect on blood vessels. Sildenafil works by relaxing the smooth muscles in the blood vessels, leading to vasodilation or widening of the blood vessels. This increased blood flow can cause a reddening or warming of the skin, particularly on the face, neck, or chest, which is commonly referred to as flushing. While flushing is a known side effect of sildenafil, it is typically mild and temporary. Factors like dosage, individual sensitivity, or other underlying health conditions can influence the severity of flushing.