An existing condition or a problem in the circulatory system can result in poor blood circulation. This disrupts the supply of nutrients and oxygen to various parts of the body. When vital organs do not get enough blood, they may be unable to function normally, leading to various health issues. This is why it is important to keep an eye out for the warning signs of poor blood circulation and seek treatment to prevent complications. Warning signs 1. Numbness This is one of the key warning signs of poor circulation. The restricted blood flow leads to inadequate oxygen and nutrient supply to the extremities, leading to such complications. Here, one may experience numbness and tingling sensation in the hands and feet. This feeling can also be described as pins and needles or a prickling sensation.  2. Swelling Poor blood circulation can lead to blood clots, resulting in blood accumulation in the region and blockage in blood vessels. The clots are a warning sign of another condition called DVT (deep vein thrombosis), which often develops in the lower leg but can also affect the arms and the belly. Here, even when the clot is gone, one may experience pain in the area and swelling due to the damaged blood vessel under the skin.