Anonymous wrote:OP here. I do have another kid with pretty severe special needs. 11yo is my oldest, and I thought many of his quirks were typical when he was younger (super sensitive to light, now obvious low tone issues, etc). We’ve had him evaluated for ADHD twice, and even tried medication, but it had the opposite of the intended affect. He is a serious nail biter, and I read somethings a few weeks ago about anxiety that aligned very much with what he’s got going on. The coat wearing might be further evidence (in which case I’m leaning towards possible therapy) or just a weird tween thing. I haven’t said anything to him about it beyond asking him to remove it if he’s helping me cook or something since it’s super bulky.
These things are genetically inheritable, OP, so it's not surprising that your 11 year old might be mildly or moderately affected by inattentive ADHD, or anxiety or something else, if his relatives are too. My son with diagnosed inattentive ADHD and borderline high-functioning autism has low tone with poor coordination/motor skills, low processing speed, sensory aversions (needs soft textures as well) and, we noticed that when he's "optimally" medicated for his ADHD, his rigid habits increase to OCD proportions! Fun times...
So keep an eye on the little things, not because they're concerning in themselves separately, but because taken all together, they are indicative of a larger picture.