What causes acne and pimples in adolescents?

Explanation

### Step-by-Step Text Solution:

1. **Understanding Adolescence**:
- Adolescence is a developmental stage that occurs during puberty, typically between the ages of 13 to 19 years. This is a critical period of physical and hormonal changes.

2. **Activation of Glands**:
- During puberty, the body undergoes significant hormonal changes that lead to the activation of sweat glands and sebaceous (oil) glands.

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