Cancer is not just one disease, but a family of diseases that share a common problem - when
some cells in your body start growing out of control.
To understand this, let’s think of the human body as a big city.
The cells are the citizens of this city.
Each citizen (cell) has a job, a set of rules, and a schedule for when to work, when to rest, and when to retire (die).
Normally, cells:
- Grow when the body needs them (for example, to heal a wound).
- Divide into new cells when old ones wear out.
- Die when they are too old or damaged (a natural process called cell death).
Cancer happens when some cells stop following these rules.
Instead of retiring (dying) at the right time, they:
- Keep growing and multiplying, even when the body doesn’t need them.
- Form a lump called a tumor (though not all cancers form lumps—blood cancers like leukemia don’t).
Sometimes, these cells travel to other parts of the body and start growing there too. This spreading is called metastatis.
How Does Cancer Happen?
Cancer starts when something damages the cell’s instruction manual—the DNA.
DNA tells the cell:
- When to grow
- When to divide
- When to die
When the DNA gets changed (mutated), the cell becomes confused.
Imagine if the city’s traffic lights stopped working:
- Some cars would keep going without stopping.
- Chaos would spread to other streets.
- Soon, the whole city would be in trouble.
Similarly, damaged cells keep growing when they shouldn’t, and the body can’t stop them
What Causes This DNA Damage?
Several things can cause DNA changes:
1. Unhealthy Habits
- Smoking: The #1 cause of lung cancer. Cigarette smoke contains more than 70 cancer-causing chemicals.
- Too much alcohol: Linked to mouth, liver, breast, and other cancers.
- Unhealthy diet & obesity: Junk food, processed meats, and sugary drinks increase risk.
2. Environmental Factors
- Pollution
- Chemicals at work (asbestos, pesticides)
- Radiation (including too much sun exposure)
3. Infections
- Certain viruses like HPV (Human Papillomavirus) can cause cervical cancer.
- Hepatitis B and C can cause liver cancer.
4. Genetics
Some people inherit faulty genes from parents. Example: BRCA genes increase breast and ovarian cancer risk.
5. Random Chance
Sometimes, cells make mistakes when dividing—even in healthy people.
Key Point:
Not everyone exposed to these risks will get cancer. It’s like a lottery: some tickets increase your chances, but not every ticket wins.
But do want to buy this ticket?
Why Does Cancer Develop?
The WHY can be tricky because cancer is a combination of:
- Risk factors (like smoking or poor diet)
- Genetics
- Age
- And sometimes, pure chance
Let’s break it down:
1. Lifestyle Choices
Smoking causes 30% of all cancer deaths globally.
Diets low in fruits/vegetables and high in processed food also raise risks.
2. Environmental Exposure
People living in highly polluted cities are more prone to lung and throat cancers.
3. Age
Most cancers occur in older people because their cells have had more time to accumulate damage.
4. Genes
If cancer runs in your family, your risk is higher—but it’s not a guarantee.
Can Cancer Spread?
Yes.
Cancer cells are like bad citizens who not only break rules but move to other towns and create chaos there too.
They break away from the original tumor.
Travel through blood or lymph system.
Start growing in new organs like lungs, liver, bones, or brain.
This stage is called metastatic cancer, and it’s harder to treat.
So lets be mindful for Prevention is Always Better. Don't you agree?
Common Types of Cancer
- Breast Cancer (most common in women)
- Lung Cancer (linked to smoking and pollution)
- Prostate Cancer (common in men)
- Colon Cancer
- Blood Cancers (Leukemia, Lymphoma)
How Do You Know You Might Have Cancer?
Early cancer often has no symptoms—that’s why screening is important.
Later signs can include:
- Unusual lumps
- Sudden weight loss
- Long-lasting cough
- Bleeding without reason
- Persistent fatigue
If something feels wrong for more than 2–3 weeks, see a doctor.
How to Prevent Cancer?
You can’t prevent 100%, but you can lower your risk a lot:
- Quit smoking
- Eat healthy (fruits, veggies, whole grains)
- Exercise regularly
- Limit alcohol
- Protect your skin from the sun
- Get vaccinated (HPV & Hepatitis B vaccines)
- Learn self examination
- Go for regular check-ups and screenings
Simple Analogy
Think of your body as a garden:
- Healthy plants grow in balance.
- Weeds (cancer cells) appear when the garden is neglected.
- Regular care (healthy habits and screening) keeps weeds away.
In Short
What is Cancer? Uncontrolled growth of abnormal cells.
How does it happen? Damage to DNA from lifestyle, environment, infection, genetics, or random errors.
Why does it develop? Risk factors add up over time.
Best defense is to adopt healthy lifestyle and be aware of body and act promptly if in doubt.
Should you want to know more and organise awareness sessions for your students, employees, housing society members, Club members .. you are welcome to contact Sanjeevani Life Beyond Cancer.
They have conducted over 2000 awareness programs and do not charge any fee for holding these programs.
To contact Sanjeevani you are welcome to send the team a what's app message on
+91 8691000800 / +91 8691000801
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