What reactions might occur in the body when using electronic cigarettes?

When using electronic cigarettes, the body undergoes a series of short-term and long-term reactions, ranging from mild discomfort to severe organ damage. Current evidence indicates that electronic cigarettes are not harmless.
?? Overview: What Different Substances Do in the Body
The complex components of e-cigarette smoke are the root cause of the body's reactions. According to the introduction by Dr. Xiao Dan, a chief physician from China-Japan Friendship Hospital and other experts, the harms of e-cigarettes mainly come from the following aspects:
Nicotine: It is the core substance that leads to addiction. It stimulates the cardiovascular system and affects brain development.
Propylene glycol and propylene glycol alcohol: They are the basis of e-liquid. When heated, they may irritate the respiratory tract, causing discomfort in the throat and mouth.
Formaldehyde and acetaldehyde: These are definite carcinogens that cause strong irritation to the respiratory tract.
Flavoring agent: Used to create various flavors. Inhalation may cause inflammation or even asthma.
Heavy metals: Derived from heating elements, they contain substances such as nickel and chromium. Long-term inhalation of these substances is also harmful.
⚡️ Summary of Short-Term and Long-Term Effects
When these components enter the body, they can cause a series of immediate and long-term health risks.
?? Short-term adverse reactions (may occur within minutes to several days)
Respiratory symptoms: Increased coughing, dry throat, chest discomfort and increased sputum production.
Oral and nasal irritation: Dry mouth, oral irritation.
Neurological reactions: dizziness, headache, nausea.
Cardiovascular changes: increased heart rate, elevated blood pressure.
⚠️ Long-term health risks (may occur months or years later)
Lung damage: Decreased lung function; May lead to "E-cigarette or Vaping Product Use-Associated Lung Injury" (EVALI).
Cardiovascular burden: Increases the risk of developing cardiovascular diseases such as hypertension and heart disease.
Cancer risk: Long-term exposure to carcinogens such as formaldehyde can significantly increase the risk of developing cancer.
Reproductive development impact: May affect fetal development and damage reproductive system health.
Other health issues: Damage to connective tissues, impact on emotional control, decline in memory.
?? Risks for Special Groups
For special groups such as teenagers, the harm of e-cigarettes is particularly severe. Nicotine can continuously affect brain development until around the age of 25, damaging teenagers' attention, learning ability and memory. Moreover, the risk of teenagers smoking traditional cigarettes after using e-cigarettes increases by at least twice. Pregnant women using e-cigarettes can also have a significant impact on the neurological development of the fetus.
?? A dangerous variant: "Upgraded Electronic Cigarettes"
What needs to be particularly vigilant about is the "upgraded electronic cigarettes" that illegally contain synthetic cannabinoids and animal anesthetics (such as tramadol). It is not an ordinary electronic cigarette; it is a new type of drug that is highly addictive and extremely harmful, and it may even cause respiratory arrest and endanger life.
?? Summary
Whether it is short-term discomfort or long-term risks, the negative impact of e-cigarettes on health is extensive and severe. We hope this comprehensive explanation can help you have a more scientific understanding of it and make more responsible decisions for your own health.