Endocrine Hypertension
Endocrine hypertension means high blood pressure caused or worsened by hormone problems. It should be suspected when BP starts at a young age, is difficult to control despite multiple medicines, is associated with low potassium, sudden BP spikes, adrenal nodules, weight gain with purple stretch marks, fast heartbeat, sweating, headache, or other hormone-related symptoms.
Important hormonal causes include primary hyperaldosteronism, pheochromocytoma or paraganglioma, Cushing’s syndrome, thyroid disease, hyperparathyroidism, acromegaly, and adrenal incidentaloma. Obesity, diabetes, insulin resistance, PCOS, and sleep apnea can also worsen BP control.
Evaluation may include potassium, kidney function, aldosterone-renin ratio, plasma or urine metanephrines, cortisol tests, thyroid tests, calcium, PTH, sugar, cholesterol, and CT or MRI when needed. Identifying the cause is important because some forms of endocrine hypertension can be treated specifically, and in selected cases even improved or cured with surgery. Medicines such as spironolactone, eplerenone, or alpha-blockers may be used depending on the cause. Early diagnosis, correct treatment, lifestyle changes, and regular follow-up can reduce the risk of heart disease, stroke, kidney damage, and long-term complications.
Hyponatremia
Hyponatremia means the sodium level in the blood is lower than normal. Sodium is important for brain function, nerves, muscles, and body fluid balance. Mild low sodium may cause no symptoms, but some patients may have tiredness, weakness, headache, nausea, vomiting, dizziness, confusion, drowsiness, falls, or poor concentration. Severe or sudden low sodium can cause seizures, coma, and can be life-threatening.
Common causes include excess water intake, vomiting, diarrhea, dehydration, kidney disease, liver disease, heart failure, thyroid disease, adrenal insufficiency, SIADH, infections, surgery, pain, stress, and certain medicines such as diuretics, antidepressants, epilepsy medicines, pain medicines, or chemotherapy drugs. Evaluation may include blood and urine tests such as serum sodium, serum osmolality, urine osmolality, urine sodium, kidney function, thyroid test, cortisol, glucose, and potassium.
Treatment depends on the cause, severity, and speed of sodium fall. Mild cases may need fluid control, medicine review, salt correction, or treatment of the underlying cause. Severe symptoms such as confusion, seizures, severe drowsiness, or very low sodium need urgent hospital care. Sodium correction must be done carefully, because correcting it too fast can be dangerous. Regular monitoring and avoiding excess water intake without medical advice can help prevent recurrence.
Hypernatremia
Hypernatremia means the sodium level in the blood is higher than normal. Sodium is important for body fluid balance, nerves, muscles, and brain function, but too much sodium usually means the body has lost more water than salt. Common symptoms include excessive thirst, dry mouth, weakness, tiredness, irritability, confusion, drowsiness, seizures, or coma in severe cases.
Common causes include dehydration, poor water intake, fever, sweating, vomiting, diarrhea, uncontrolled diabetes, kidney problems, certain medicines, and diabetes insipidus, a condition that causes excessive urination and excessive thirst. Elderly, bedridden patients, babies, and patients unable to drink enough water are at higher risk.
Evaluation may include blood sodium, serum osmolality, urine osmolality, urine sodium, kidney function, glucose levels, and urine output monitoring. Treatment depends on the cause and severity. Water replacement is the main treatment, either by mouth or IV fluids when needed. Sodium correction must be done slowly and carefully, because rapid correction can be dangerous. Patients with fever, vomiting, diarrhea, fasting, poor intake, excessive thirst, or frequent urination should seek early medical advice. With proper diagnosis, safe correction, and monitoring, hypernatremia can usually be treated effectively.
Hypokalaemia
Hypokalaemia means the potassium level in the blood is lower than normal. Potassium is important for muscle strength, nerve function, digestion, and normal heart rhythm. Mild low potassium may cause no symptoms, but some patients may feel tiredness, weakness, muscle cramps, body pains, constipation, bloating, or palpitations. Severe hypokalaemia can cause paralysis-like weakness or dangerous heart rhythm problems and needs urgent care.
Common causes include vomiting, diarrhea, excess sweating, poor intake, water tablets or diuretics, insulin, nebulisations, steroids, laxative misuse, low magnesium, kidney potassium loss, and hormonal problems. When low potassium occurs with high BP, causes like primary hyperaldosteronism or Cushing’s syndrome should be considered. Low potassium can also occur with normal BP due to stomach, kidney, medicine-related, or genetic causes.
Evaluation may include blood tests for potassium, sodium, magnesium, calcium, kidney function, glucose, and bicarbonate, along with urine potassium and ECG when needed. Treatment depends on the severity and cause. Mild cases may improve with potassium-rich foods and oral potassium supplements, while severe cases may need IV potassium in hospital. Potassium correction should be monitored carefully, because both low and high potassium can be harmful. Kidney patients should not take extra potassium without medical advice.
Hyperkalemia
Hyperkalemia means the potassium level in the blood is higher than normal. Potassium is important for muscle, nerve, and heart function, but too much potassium can be dangerous because it can disturb the heart rhythm. Mild hyperkalemia may cause no symptoms, while some patients may feel weakness, tiredness, numbness, palpitations, or chest discomfort. Severe hyperkalemia needs urgent medical care.
Common causes include kidney disease, diabetes, dehydration, severe illness, adrenal hormone deficiency, uncontrolled sugars, acidosis, potassium supplements, and medicines such as ACE inhibitors, ARBs, spironolactone, eplerenone, painkillers, and some BP medicines. Sometimes a blood sample problem can falsely show high potassium, so repeat testing may be needed.
Evaluation may include repeat potassium testing, kidney function, sodium, bicarbonate, sugar levels, urine tests, and ECG when needed. Treatment depends on the potassium level, symptoms, ECG changes, kidney function, and cause. Severe cases may need hospital treatment to protect the heart and lower potassium safely. Patients with kidney disease should avoid potassium supplements and excess high-potassium foods such as coconut water, bananas, oranges, tomatoes, potatoes, spinach, dry fruits, and fruit juices unless advised by a doctor. Regular monitoring helps prevent recurrence and protects the heart and kidneys.
SIADH
SIADH means “syndrome of inappropriate ADH.” In this condition, the body makes too much ADH hormone, which causes the body to retain excess water. This dilutes the sodium level in the blood and leads to hyponatremia, or low sodium. SIADH can occur due to lung infections, brain disease, stroke, head injury, surgery, pain, stress, certain cancers, or medicines such as antidepressants, epilepsy medicines, pain medicines, chemotherapy drugs, and some nausea medicines.
Mild SIADH may cause no symptoms, but low sodium can lead to tiredness, weakness, headache, nausea, vomiting, dizziness, confusion, drowsiness, falls, seizures, or coma if severe. Diagnosis usually includes blood sodium, serum osmolality, urine osmolality, urine sodium, kidney function, thyroid test, cortisol, glucose, and medicine review. Treatment depends on severity and cause. Mild cases may improve with fluid restriction, stopping the causative medicine, and treating the underlying illness. Severe low sodium or neurological symptoms need urgent hospital care. Sodium correction must be done slowly and carefully, because rapid correction can be dangerous. Regular monitoring helps prevent recurrence and protects brain and overall health.
Diabetes Insipidus
Diabetes insipidus is a rare condition that causes excessive thirst and passing large amounts of urine, both during the day and night. It is different from diabetes mellitus or “sugar diabetes” and is not caused by high blood sugar. Diabetes insipidus happens when the body does not make enough ADH/vasopressin hormone, called central diabetes insipidus, or when the kidneys do not respond properly to this hormone, called nephrogenic diabetes insipidus.
Patients may feel very thirsty, drink large amounts of water, wake up often at night to pass urine, feel tired, or become dehydrated. If water intake is not enough, sodium levels in the blood can become high, which may be dangerous. Causes include pituitary or brain problems, pituitary surgery, head injury, infections, tumors, inflammation, kidney disease, lithium medicine, and rarely pregnancy.
Diagnosis may include blood sugar testing, serum sodium, serum osmolality, urine osmolality, urine volume measurement, water deprivation test, desmopressin response test, and sometimes pituitary MRI. Central diabetes insipidus is usually treated with desmopressin, available as tablet, nasal spray, or injection. Water intake and sodium levels must be monitored carefully, because drinking too much water while taking desmopressin can cause low sodium. Special care is needed during fever, vomiting, fasting, surgery, travel, or poor intake. With correct diagnosis, safe treatment, and regular monitoring, most patients with diabetes insipidus can live a normal and active life.