I cant answer this question as I have several different ones so severe they prevent me from being able to leave my house without support and even if one fixed one, their would still be the others so I still wouldnt be very functional. Extremely disabling MCS, POTS, PEM and brain problems.
* MCS (I can collapse while out due to this and its severely limiting as I just cant have just anyone into my home and a chemical hit can leave me in such a confused unfunctional state where I cant do anything. Once while out and getting hit with a chemical I didnt even know any more my address where I'd lived for 17 years so couldnt get home).
* POTS (makes me have to have someone push me in wheelchair if out). Leaves me struggling to cook as I struggle to stand for long.
* the brain memory problems.. like as if I have Alhemizers
I need help just to go out and make sure I'm not trying to leave the house not dressed properly, or dirty and without things like my keys. Back when I could still walk when out, I had support workers have to several times pull me off of road as I forgot I was crossing a road while I was crossing it and almost got hit by cars. Leaves me struggling to cook.
* the PEM (Im hit with this very fast and severely if Im able to do things and the consequence of this can leave me unable to even roll over in bed). this one probably "feels the worst" then any of the others when hit with severe PEM, I hate feeling terribly ill. Huge restriction on how much I can do or I end up felling like Im dying (feeling poisoned)
I found out the other day the hard way that I PEM badly right thought the next day if I have to focus for 90 mins (I think my thinking limit is only about an hour a day eg if I have a visitor here and are trying to talk to them, Im really struggling and starting to get unwell after about a hour of face to face chat (far faster if Im on a phone as that takes more focus).. I havent timed that but that's my estimate.
I dont get to physically PEM much though as the POTS very quickly stops me from being able to reach that point with activites. Its hard to PEM with over physical activity when one is having to use a wheelchair which you cant push. So I guess currently the brain stuff is PEMing me more
I really do not know which of those things for me is worst as they are all horrific issues, its like asking someone to choose between being blind or having their legs amputated, which do you prefer? lol.
(in the past sleep problems would of been on that list too, my sleep issues at one point were so bad that I was going for up to 4-5 days without no sleep at all and completely was unfunctional, actually getting halluncinations due to that. You can not function without sleep)