What are the common symptoms of hyperparathyroidism?

People with hyperparathyroidism often do not experience any clear symptoms; the condition is frequently discovered through routine blood tests that show elevated calcium levels [3]. When symptoms do appear, they are often mild and nonspecific, which can initially make it difficult to link them to this hormonal disorder. In cases where no symptoms are present, doctors may recommend periodic monitoring instead of immediate surgical intervention, especially if kidney function and bone density are within normal ranges [3].

Common and Nonspecific Symptoms

When symptoms do occur, they are often directly or indirectly related to abnormal levels of parathyroid hormone (PTH) and calcium in the blood [3]. These symptoms, which a patient might notice, include:

• Persistent fatigue and general, unexplained exhaustion.
• Muscle weakness that makes daily activities feel more difficult.
• Mood swings, including depression or feelings of sadness.
• Bone and joint pain resulting from the release of excess calcium from bone tissue into the bloodstream [3].
• Difficulty concentrating, or what some refer to as "brain fog."

Symptoms Associated with Hypercalcemia

When calcium levels in the blood become very high (hypercalcemia), symptoms may worsen and become more pronounced, affecting various body systems [2]. These symptoms appear as a result of calcium being withdrawn from the bones and increased absorption from the digestive system [2], and include:

• Unusual increase in thirst accompanied by a frequent need to urinate.
• Loss of appetite, in some cases accompanied by nausea or vomiting.
• Persistent constipation.
• Unexplained weight loss not related to a diet.
• Kidney stone formation due to the accumulation of excess calcium that the kidneys are attempting to eliminate through urine [3].

When Should You See a Doctor?

Early diagnosis is crucial to avoid complications such as bone weakness (osteoporosis) or chronic kidney problems. If you notice any of the symptoms mentioned above, it is essential to see a doctor to undergo the necessary examinations, which usually include measuring the level of calcium and parathyroid hormone in the blood [3]. For more details regarding diagnostic procedures and available treatment options, you can review the article Hyperparathyroidism: Diagnosis of High Calcium and Treatment (Arabic).

Remember that the presence of these symptoms does not necessarily mean you have hyperparathyroidism, as they may overlap with many other health conditions. A specialist doctor is the only one capable of evaluating your condition through clinical examination and laboratory tests. In cases that do not require immediate surgery, doctors may choose to closely monitor calcium levels and kidney function periodically to ensure the disease does not progress [3].

Medical references

• Parathyroid Disorders
• Parathyroid Cancer Treatment (PDQ®)–Patient Version
• Primary Hyperparathyroidism