Symptoms Listed By Person. Following are the symptoms posted by people with Gilbert's Syndrome on the Gilberts Web wulconf.com each case I have presented the symptoms reported in list form, followed by relevant quotes that provide more details. Migraine is a complex disorder characterized by recurrent episodes of headache, most often unilateral and in some cases associated with visual or sensory symptoms—collectively known as an aura—that arise most often before the head pain but that may occur during or afterward (see the image below). Misdiagnosis of Adult ADHD. It is common for a diagnosis of adult ADHD to be delayed or missed because symptoms can be similar to other diseases, disorders and conditions.. They include petit mal seizures, in which a person appears to daydream excessively, blank out, or is "spaced o.