Why does quitting smoking cause heart discomfort?

Dec 26, 2021 Source: Cainiu Health
Disease description:

After quitting smoking, I experienced chest tightness and pain, although I have no history of heart disease. Why does my heart feel uncomfortable after quitting smoking?

Doctor's answer (2)
Dr. Zhang Min
When people first quit smoking, their bodies may experience adjustment-related discomfort, such as chest tightness, pain, or precordial discomfort—these are common withdrawal symptoms. Once you fully adapt to being smoke-free and maintain abstinence for at least two weeks, these symptoms will gradually subside. To prevent these symptoms from affecting your mood or interfering with your mental well-being, you may temporarily take medications that regulate cardiac nerve function for 1–2 weeks.