Too tight chest strap after breast surgery may produce some side effects, such as affecting the heart rate, affecting breathing, and causing skin ischemia and necrosis. 1. Affecting heart rate: If the patient himself has cardiac insufficiency and other diseases, he himself will have arrhythmia and other manifestations. If the post-surgical pressure bandage is too tight, it may compress the heart, causing the patient’s arrhythmia to aggravate and symptoms such as chest tightness and palpitations to appear. 2. Impact on breathing: compression of the chest may affect the patient’s normal breathing, the patient may have breathlessness, dyspnea and other symptoms. 3. Lead to skin ischemia and necrosis: If the situation of tight chest belt is more serious, it may compress the skin tissues in the area, making the area have poor blood circulation, and in serious cases, skin ischemia and numbness and coldness of the skin may occur. Over time, it may lead to localized skin necrosis. Patients are advised to inform their doctors in time to debug the tightness of the chest strap.