"Yes, there is a relationship… kind of… I’ve spoken to quite a few INFPs who believe they have ADHD/ADD or have been officially diagnosed by a doctor and are medicated for it. (Whether this is necessary or not I won’t get into in this post.)

Many people who have dominant extroverted intuition (Ne) or auxiliary extroverted intuition In their cognitive stack can feel like, and come across to others as having ADD. Ne is a perceiving function that is by nature gathering information constantly— It doesn’t rest! Ne users are often entranced by this process — so much so that they can appear out of it, or disinterested (particularly in an academic setting). Teachers often think these students are daydreaming; however, are often surprised when the apparently inattentive student answers the teacher’s question perfectly because Ne can pay attention to many things at the same time. It’s a really cool super power. Unfortunately it’s difficult for Ne users to rein it in as it’s got a great deal of strength. I equate it to a beagle who is compelled to follow its nose wherever it may lead...

As the Ne users get older, they gain facility and balance with the other functions which makes being focused easier for them.

These are the 4 types that use Extroverted Intuition (Ne) in their dominant or auxiliary functions. I’ve listed the types that can often outwardly manifest ADD (Attention Deficit Disorder) symptoms from most to least:
ENTP, ENFP, INTP, INFP."

Sorry for the spam..