All the following are characterized by hypothyroidism , except

Options

A. weight gain
B. bradycardia
C. heat intolerance
D. decreased metabolic rate

Answer

To solve the question "All the following are characterized by hypothyroidism, except", we need to analyze the symptoms associated with hypothyroidism and identify which option does not belong.

### Step-by-Step Solution:

1. **Understand Hypothyroidism**:
- Hypothyroidism is a condition characterized by decreased levels of thyroid hormones (primarily thyroxine (T4) and triiodothyronine (T3)). This leads to a variety of symptoms due to slowed metabolism.

2. **List Common Symptoms of Hypothyroidism**:
- Fatigue and tiredness
- Increased sensitivity to cold
- Unexplained weight gain
- Dry skin and puffy face
- Bradycardia (slow heart rate)
- Depression and anxiety
- Impaired memory
- Goiter (enlargement of the thyroid gland)

3. **Analyze Each Option**:
- **Weight Gain**: This is a well-known symptom of hypothyroidism. Therefore, it is characterized by hypothyroidism.
- **Bradycardia**: This refers to a slower than normal heart rate, which is also a symptom of hypothyroidism. Hence, it is characterized by hypothyroidism.
- **Heat Intolerance**: This is not a symptom of hypothyroidism. In fact, individuals with hypothyroidism typically experience cold intolerance rather than heat intolerance.
- **Decreased Metabolic Rate**: A hallmark of hypothyroidism is a decreased metabolic rate due to low levels of thyroid hormones. Thus, it is characterized by hypothyroidism.

4. **Identify the Exception**:
- Among the options provided, heat intolerance is the only one that is not associated with hypothyroidism. Instead, individuals with hypothyroidism are more sensitive to cold.

### Conclusion:
The answer to the question is **Heat Intolerance**.

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