Oh Wendy I am so sorry you have been treated so badly. If you can remember the time and date you were given stitches without anaesthetic then I would write a complaint to the hospital about it, because that is a violation of your rights to be treated like any other person who comes in with a similar complaint that was not caused by self injury.
Unfortunately yes i have been treated most terribly at times when I have presented with self injurious behavior - I won't go into details right now, maybe I will at a later date. I guess they were hoping it would put me off doing it again, but I still ended up back there the next evening having done it again. So obviously their methods do not work. They just serve to make the person feel worse.
Having said that there have been occasions where I have been treated as I should and with compassion and I am truly thankful for that. TBH if it was not for one doctor, the ambulance staff, the A&E staff and some nurses that went the extra mile then I really would not be alive right now, and that is no exageration so on the whole I really can not complain. My worse experiences have been on eating disorders units and under the care of other organisations, not where staff were involved in life or death situations. The last time I was in one, my family and my friends got involved writing to the local mp, the PALs officer, instigated meetings with the ward manager etc, everyone they could, it was appalling, and I guess that is just the tip of the iceberg of the appalling state the NHS is in at the moment.