Restlessness, intolerance to temperature and increased metabolism is due to

Options

A. Thyrotoxicosis
B. ACTH deficiency
C. Pituitary deficiency
D. Calcitonin deficiency.

Answer

To solve the question regarding the symptoms of restlessness, intolerance to temperature, and increased metabolism, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Symptoms**: The symptoms mentioned are restlessness, intolerance to temperature, and increased metabolism. These symptoms are often associated with hormonal imbalances.

2. **Understand Thyrotoxicosis**: Thyrotoxicosis refers to a condition where there is an excess of thyroid hormones in the body. This can lead to increased metabolic activity, which explains the increased metabolism.

3. **Link Symptoms to Thyroid Hormones**: The thyroid hormones, particularly thyroxine (T4), play a crucial role in regulating metabolism and energy levels. An excess of these hormones can lead to symptoms like restlessness and intolerance to heat (as the body is in a hyperactive state).

4. **Consider Graves' Disease**: Graves' disease is an autoimmune disorder that is the most common cause of hyperthyroidism (which leads to thyrotoxicosis). It results in the overproduction of thyroid hormones, leading to the symptoms mentioned.

5. **Conclusion**: Therefore, the symptoms of restlessness, intolerance to temperature, and increased metabolism are due to thyrotoxicosis, commonly caused by Graves' disease.

### Final Answer:
Restlessness, intolerance to temperature, and increased metabolism are due to thyrotoxicosis, which is most commonly caused by Graves' disease.

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