top 10 Cancer causes?

Major Causes of Cancer

1. Genetic Mutations

Cancer begins when DNA in cells gets damaged or changes.
These mutations can be:

• Inherited (from parents)

• Acquired (due to lifestyle or environment)

Lifestyle-Related Causes

2. Tobacco Use

Smoking is the number one preventable cause of cancer, especially lung, throat, and mouth cancers.

3. Poor Diet

A diet high in:

• Processed foods

• Red meat

• Sugary foods
  and low in fruits/vegetables increases cancer risk.

4. Alcohol Consumption

Heavy drinking can cause:

• Liver cancer

• Breast cancer

• Mouth and throat cancers

5. Obesity & Lack of Exercise

Being overweight increases risks of breast, colon, kidney, and other cancers.

Environmental & External Causes

6. Radiation Exposure

• UV radiation (sun, tanning beds) causes skin cancer.

• Ionizing radiation (X-rays, radon gas) can also increase risk.

7. Chemicals & Carcinogens

Long-term exposure to certain chemicals raises cancer risk, such as:

• Asbestos

• Arsenic

• Benzene

• Pesticides

• Industrial chemicals

Infections That Cause Cancer

8. Viruses & Bacteria

Some infections directly increase cancer risk:

• HPV → cervical, throat cancer

• Hepatitis B & C → liver cancer

• H. pylori → stomach cancer

• HIV → increases risk of lymphomas and Kaposi sarcoma

Biological Factors

9. Hormones

Hormonal imbalances or long-term hormone therapy can raise risk of breast, ovarian, and uterine cancers.

10. Age

Cancer risk increases with age because cells accumulate more damage over time.