Hypoarenia is a term for a hypothesised condition of the adrenal glands. The terms adrenal exhaustion or adrenal fatigue are often used (and connected to hypoadrenia) by complementary and alternative therapists, and can be fatal if in its later stages. It often causes frequent dizziness, fainting, incoherence, and loss of brain activity. Hypoadrenia can be treated by special healthcare professionals, though it is still not completely understood by medical practitioners.