Could you get undiagnosed for adhd or austism or anything like that after you have been diagnosed ?

Yes you can: If a disorder has resolved it can be considered to be in "remission." or, a doctor can also indicate that the condition is no longer present by using the expression, "no diagnosis or condition." finally, a doctor may believe and state that the condition is still present but well-managed by medications or other therapies.

Recent evaluation: An updated evaluation from a psychiatrist or psychologist can eliminate certain diagnoses and comment on the loss or modification of certain symptoms that led to the original diagnosis. Working closely with a doctor on this goal is essential.

Autism rarely: Very few people with an autism spectrum disorder lose the diagnosis, but many learn the skills needed for independent life. With adhd, boys are more likely to not have symptoms as adults than girls. Those who take medication for adhd from a young age are more likely to not have adhd symptoms as adults than those who do not take medication.

Possible: The earlier diagnoses are made the more chance for the diagnosis not being precisely correct. About half of children diagnosed with adhd will 'out grow' their symptoms by the end of high school. Some of the rest will develop strategies to manage their inattentiveness and the rest will continue to exhibit signs of adhd which may respond to medication.

Symptoms of either: neurodevelopmental disorder can improve with multimodal management so as not to impact daily functioning. Toddlers with Autistic Spectrum Disorder without cognitive delays, if diagnosed & treated with intensive, repetitive, ongoing early behavioral & educational therapy, may seem only "quirky" by school age. 85% of teens & 65% of adults with ADHD have symptoms that continue to impact function.