What is Adrenal Insufficiency?
Adrenal insufficiency occurs when the body cannot produce enough adrenal hormones—particularly cortisol.
Some children may also lack aldosterone, another critical hormone involved in salt and water balance.
Without adequate cortisol, the body struggles to:
The effects are especially pronounced during infections, dehydration, injury, or surgery.
The Body's "Stress Response" Stops Working
Normally, when a child becomes sick:
A child with adrenal insufficiency cannot mount this response properly.
This means even a routine viral illness can sometimes trigger severe deterioration.
There Are Different Types of Adrenal Insufficiency
1. Primary Adrenal Insufficiency
This happens when the adrenal glands themselves are damaged or unable to function properly.
One well-known cause is:
In children, other causes include:
In primary adrenal insufficiency:
This combination can be particularly dangerous.
2. Secondary Adrenal Insufficiency
Here, the adrenal glands themselves are normal, but the brain fails to send the signal needed to stimulate cortisol production.
This usually involves problems with:
Causes may include:
In secondary adrenal insufficiency:
Why Adrenal Insufficiency is Often Missed
One of the biggest challenges is that symptoms can initially be vague and nonspecific.
Children may simply appear:
Symptoms can develop gradually.
Parents may notice:
These symptoms overlap with many common childhood conditions, which is why adrenal insufficiency is sometimes diagnosed late.
What Symptoms Should Parents Watch For?
Symptoms vary depending on severity and age.
Common symptoms include:
In younger children and infants:
Some Signs Are Particularly Important
1. Low Blood Sugar (Hypoglycemia)
Children rely heavily on cortisol to maintain glucose levels.
Low cortisol may lead to:
Sometimes recurrent hypoglycemia is the first clue.
2. Darkening of the Skin
In primary adrenal insufficiency, some children develop:
This occurs because ACTH levels become very high when the body is desperately trying to stimulate failing adrenal glands.
3. Salt Imbalance
If aldosterone is also deficient, children may develop:
Infants may deteriorate rapidly.
Illness Can Suddenly Make Things Worse
A child who appears relatively stable may suddenly worsen during:
This happens because the body suddenly needs much more cortisol—but cannot produce it.
This severe worsening is called an adrenal crisis, which we will discuss in the next post.
How is Adrenal Insufficiency Diagnosed?
Doctors may perform:
Additional investigations may include:
Diagnosis often requires interpreting the entire clinical picture—not just one blood result.
How is it Treated?
Treatment involves replacing the hormones the body cannot make.
This usually includes:
Families are also taught:
Management is lifelong in many conditions.
Why Education is Critical
Children with adrenal insufficiency can often live active and healthy lives.
But safety depends heavily on:
The condition is manageable—but it requires vigilance.
When Should Parents Seek Urgent Medical Attention?
Seek immediate medical care if a child with known or suspected adrenal insufficiency develops:
These may indicate an evolving adrenal crisis.