i say yes. their are idfferent forms of subspace, the one that you can most definitely self induce is pain. of course the term self masochist seems to be frowned upon.im not tellling you to kill yourself but ever tried a self flogging? or taking a hanger and self whipping your inner theighs till it welts and turns sooooo warm and the endorphines start to run......gentle pain and build it up until you reach that point. I am saying this as a masochistic Domina, I know odd combo but I most definitely can achieve a great pain high and I do not submit nor do I want a Dom minus the hubby sometimes so I hae done self whippings/etc in the past and achieved this. its not a common thing for me but the few times i did it worked
There are many, many procedures that are not "pain free" these days, so anesthesia is not always the answer. Needle biopsies, spinal taps, amniocentesis, nerve conduction studies, to name a few.
Non-ordinary reality can be reached by a number of techniques. For me, I find it through focused meditation, shamanic journeying and sex. Obviously, having sex is out for you in this situation. Meditation and journeying might be options. For me, music is very important in doing these...would the let you wear an mp3 player?
Other techniques include self-hypnosis and breath work.