Hello Classicgirl,
I am not sure what your doctor suspects for an Adrenal problem. Possibilities are over or under function. An over function of the adrenal cortex leads to hypercortisolism (Cushing's syndrome). Where an underfunction in this part causes adrenal hypocortisolism (Addison's disease). Depending on which of these is suspected, tests would include measuring the blood levels of certain hormones (cortisol, 17-hydroxyprogesterone, Renin-angiotensin, ACTH) as well as Calcium, potassium, sodium. Adrenal stimulation/supression tests may also be done. First levels of cortisol would be measured then you are given an injection of a stimulating hormone (ACTH) after 30 min cortisol levels are again measured, and possibly again after 1 hr. a failure of cortisol to reach a certain level after the injection indicates an adrenal underfunction. Supression tests work simular.
An overfunction of the adrenal medulla (the inner part of the gland) would be associated with over production of epinepherine (adrenaline). Symptoms would be much like that of a "panic attack", heart racing, sweating, dilated pupils etc.
You can probably also expect a bodily examination, including height, weight, blood pressure. And likely an ultrasound examination of the kidneys/adrenals.
I myself have adrenal insufficiency (Addison's). On ultrasound the doc can see that my adrenals are shrunken (too small) and after stimulation my cortisol level is still not measurable. I have to take cortison lifelong (simular to someone with diabeties, or hypothyroid, that has to replace the missing hormones).
I wish you lots of luck, and I hope that truly nothing is wrong here, and whatever is found can be treated and cured!
Grüß,
Monique