Secondary hyperparathyroidism is a condition where the parathyroid glands produce too much parathyroid hormone (PTH) in response to low levels of calcium in the blood. This often occurs in people with chronic kidney disease, as their kidneys struggle to maintain proper calcium and phosphate balance. As a result, the body tries to compensate by increasing PTH production. The excess PTH can lead to various health issues, including weakened bones and increased risk of fractures. Treatment typically focuses on managing the underlying cause, such as improving kidney function or adjusting dietary intake of calcium and phosphate to restore balance in the body.