The symptoms of ADD are similar to other conditions. The reason someone may think they have ADD is because it is more recognized and the symptoms are well known. From looking at the symptoms, I have all of them but have not considered myself having the illness. The stimulant medicine used for treatment increases the positive neurotransmitters and release of dopamine in the brain. People who use medications that have similar effects sometimes report emotional numbness after discontinuing long use. It may be due to the brain's dependency on the drug and minimizes its neurotransmitter functioning under natural response. Well, I personally think this is the best advice in this thread. It's always wise to trust the words of an unqualified self-diagnoser.