The world’s top three deadly cardiovascular diseases – myocardial infarction, stroke and venous thromboembolism – share a common “culprit” – blood clots! Blood clots, which are harmful substances in the human blood vessels, like sludge in the sewer, often block our arteries and veins. Blood clot is a systemic disease with many symptoms, some of which are not obvious, such as cold limbs, swelling, numbness, pain, dizziness, chest pain, and difficulty in breathing, all of which may be related to blood clots. We have summarized several typical symptoms, and hope you will not ignore them and take precautions in time. 1, the elderly sleep drooling If you often drool in your sleep, you should pay attention to the risk of cerebral thrombosis. This kind of drooling is not to which side of the head when sleeping, but always to one side. This is mainly because cerebral thrombosis mostly causes local muscle dysfunction in the pharyngeal cavity. 2.Inexplicable vertigo If you often have sudden vertigo, you should pay attention to it. Vertigo is an extremely common symptom among the precursors of cerebral thrombosis, especially in the early morning when you wake up. In addition, it also occurs easily after fatigue or bathing. Especially for hypertensive patients, if dizziness occurs repeatedly more than 5 times in 1 to 2 days, the risk of heart and brain disease increases. 3. Numbness in the limbs If you feel a little numbness in your left leg, you may think that you are pressed or tired until it develops into pain before you think of seeking medical attention. But in fact, this may be the heart or other parts of the blood clot into your arteries, leg artery embolism after this part of the leg on the lack of blood, the skin pale, temperature decreased, and even the dorsalis pedis artery may not be able to feel. 4, chest tightness and chest pain If you do not exercise for a long time in front of the computer, blood will form clots in the veins, more serious, the blood clots may fall off and flow with the blood to the lungs, if the size of the embolus is large, stuck in the larger branches of the pulmonary artery or even the main trunk, or a lot of emboli, resulting in a large area of lung infarction, then it will cause serious consequences, the body will show chest tightness, chest pain, cough, hemoptysis, whistling Difficulty in breathing and other symptoms, and even sudden death in serious cases.