They don't stand for anything. KISS is not an acronym; it means nothing more than the word kiss. And it certainly does NOT stand for Knights In Satan's Service. See the â¦ Related Link below. Absolutely nothing. They wanted an inflammatory name with four letters, and because they couldn't have the f-word they picked Kiss as the next best.
The symptoms of ADHD appear to arise, on average, between 3 and 6 years of age, particularly for the subtypes of ADHD associated with hyperactive and impulsive behavior. Others may not develop their symptoms until somewhat later in childhood.
According to New Zealand's ADHD Online Support Group, the onset of ADHD usually occurs before the person is 7 years old. For about 75% of ADHD sufferers, symptoms continue into adulthood. However, levels of hyperactivity tend to decrease as the person gets older.