Nowadays, many people around us have the habit of smoking, and they are addicted to smoking. Although they know that smoking will cause certain harm to the body, when they are addicted to smoking, they still desire to relieve their irritability through smoking.

Now many people around us have the habit of smoking, and they are addicted to smoking. Although they know that smoking will cause certain harm to the body, when they are addicted to smoking, they still desire to relieve their irritability through smoking.

Nowadays, many people are addicted to smoking, which is mainly because they are dependent on nicotine in cigarettes. When smoking, nicotine is absorbed through the lungs and absorbed into the brain quickly. Through a series of reactions, it stimulates the production of dopamine in the brain. Dopamine can make people feel happy.

nicotine metabolism is relatively fast. When smoking stops, the decrease in nicotine leads to a decrease in dopamine. Smokers will feel irritable and headaches, and will continue to smoke to maintain pleasure and cause addiction. So after quitting smoking, can the lungs return to their previous health status? Let’s learn about it together below.

1

Does smoking cause nicotine poisoning? The toxicity of nicotine actually depends on many aspects, including dose, duration, frequency contact pathway, type and individual differences of nicotine products. Symptoms of mild nicotine poisoning include nausea, vomiting, diarrhea, increased saliva secretion of , increased respiratory secretion and bradycardia, , and poisoning will further develop into epilepsy and respiratory depression. In severe cases, it can lead to respiratory failure, , heart failure, and even death. The dose of nicotine taken in smoking is relatively safe for the human body, and it is difficult to achieve the dose required for acute toxic effects. The actual nicotine content in tobacco is relatively low. Among the cigarettes sold on the market, the average nicotine content is about 10 mg. However, due to the volatility of smoke, cigarette butt residues and ionized nicotine, only about one mg of nicotine is absorbed per gram of cigarettes. nicotine in tobacco is absorbed faster, but it is also metabolized faster after entering the human body. The half-life of nicotine in the body is very short, only 2 to 3 hours. After reaching the liver, it is soon converted into cotinine under the metabolism of cytochromase, which makes the inhaled nicotine metabolized in a short period of time.

People have always believed that the lethal dose of nicotine in adults is 60 mg or 30 to 60 mg, but many poisoning cases and prior studies have shown that the dose is much larger this time. Bernd Meyer, professor of the Department of Pharmacology and Toxicology at the University of Graz, Austria, investigated the "60 mg" and concluded that "the lethal dose of nicotine in adults is 60 mg or 30 to 60 mg. This statement is not accurate and needs to be regulated."

2

After quitting smoking, can the lungs return to normal? Doctor: The age for quitting smoking should not exceed this age.

Long-term smoking will cause a decrease in lung function. After quitting smoking, some patients can return to normal. If lung cancer or other organic lung diseases are caused, they often cannot return to normal. However, quitting smoking can still improve the prognosis of patients and avoid aggravation of the disease.

Smoking is an important factor in inducing chronic lung disease. If long-term smoking does not have an organic impact on lung function, generally after quitting smoking, lung function will gradually recover, and the discomfort symptoms will gradually be reduced, such as coughing, phlegm, etc.

If the lung function has severely deteriorated, or even caused lung cancer, and cannot fully recover after quitting smoking, you need to go to the hospital as early as possible for relevant treatment, try to take surgical treatment for malignant tumors, and cooperate with radiotherapy and chemotherapy after the operation.

. Smoking time is short: the impact on the patient's lungs is relatively small, which may lead to mild decline in lung function and thickening of lung texture. After quitting smoking, the lungs may return to normal after a reasonable diet and life conditioning.

2. Smoking time is longer: The patient's lung epithelial cells can develop into squamous epithelium, which is an irreversible injury. In addition, smoking can also cause diseases such as emphysema and chronic bronchitis, which is an irreversible disease. Therefore, after smoking, regardless of whether the lungs can recover, they should be quit as soon as possible. Generally, the earlier the smoking, the better the recovery.

3

Doctor: The age for quitting smoking should not exceed this age

People who smoke for a long time bring huge damage to the lungs, but some injuries are not irreversible. After quitting smoking for a period of time, the cilia in the lungs may gradually restore function, and the lungs will gradually turn pink. Studies have shown that as long as people under 35 can successfully quit smoking, the lungs can completely restore their lungs to their normal levels.

However, the repair time may be longer, but it also depends on personal situation, such as the length of smoking age, physical fitness, etc. It is certain that as long as you make up your mind to quit smoking, your lungs will definitely get better and better, and other physical skills will gradually become stronger.

That is to say, if you quit smoking before the age of 35, the damaged respiratory system and immune system of the body will gradually improve, and there will be a chance to return to normal functions, which can also reduce the harm caused by smoking to the body by 95%.