Hypoparathyroidism means that the parathyroid glands are absent or do not produce enough parathyroid hormone.
Conversely, pseudohypoparathyroidism means that a person’s body does not respond to the parathyroid hormone. It is a genetic disease and is present at birth. Hypoparathyroidism usually develops later in life.
Pseudohypoparathyroidism can also be autoimmune, where the gland becomes resistant to parathyroid hormones.