Abdominal Pain
The accumulation of calcium caused by parathyroid disease in your digestive system would trigger abdominal pain. It the beginning, this sign is so subtle and mild that it can be hard for you to notice. The only way to diagnose is to take a blood test. But when the condition progresses and increases the concentration level, the pain and cramp would also go up in intensity and frequency. This makes it harder to consume foods and drinks as usual. In some cases, stomach ulcers would even develop and spread to other parts. [4]
