Lupus, which caused the Sjogren's Syndrome and the Rheumatoid Arthritis.
ADHD and Dyslexia for the none physical ailments.
At least for what's been diagnosed. Since being kicked out of school me and my siblings don't get sent to be tested anymore. Unfortunately family has a very large and long history of mental problems from my mom's side, including bipolar and schizophrenia (specially cause I've had seizures previously), so I'm generally terrified of getting tested for ANYTHING more even though I probably should for health reasons. I just don't want to know at this point unless I have to know.
These affect a LOT of areas of my life but we're focusing on how the effect drawing here.
The pain is the biggest thing that will effect my drawing abilities, as well as the shaking (sometimes my arm will slightly 'tremble' or have small twitch like spasms. making it impossible for me to draw a straight line, drawing on the computer generally fixes this issue as I have settings that will fix small tremors and I can manually fix the larger ones.
The dyslexia isn't too bad as I have someone helping with the text, it's just frustrating when words don't look right or I can't tell one word apart from the other no mater how long I stare at it trying to figure it out. Generally webcomics seem to be full of spelling errors anyway readers don't seems to mind, with the really problematic ones being pointed out. My English level is also pretty low so I don't do very complicated wording. (sometimes I have to google words from the comments will leave me lol)
ADHD can honestly make or break my production days. I'm either getting distracted by absolutely everything, or I'm hyped focused and won't stop. The hyper focusing, even though stuff gets done, is absolutely horrible for me combined with arthritis, because the pain from me hardly being able to move my arm because of pain is not enough to break me from my hyper-focus. and as a result I'll end up crippling myself for days to weeks.