What causes Gouty arthritis ?

Explanation

### Step-by-Step Solution:

1. **Understanding Gouty Arthritis**: Gouty arthritis is a type of inflammatory arthritis characterized by sudden and severe pain, redness, and swelling in the joints.

2. **Identifying the Cause**: The primary cause of gouty arthritis is the accumulation of uric acid in the body. Uric acid is a waste product formed from the breakdown of purines, which are substances found in certain foods and drinks.

3. **Crystallization of Uric Acid**: When there is an excess of uric acid in the blood, it can lead to the formation of sharp crystals. These crystals can deposit in the joints, particularly in the big toe, leading to inflammation and intense pain.

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