Some do but only to a point, I mean they do a pretty good job to ease different pains and they can also increase rate at which ones body recovers but they use a lot of energy to give fairly little, if you want you can use game presentation on ratio of energy given for HP gained to somewhere around 100-200 energy per 5 second to increase HP regeneration for an average of 0.2-0.5% per hour.
I do apologies for using this comparison but I have some games on mind at this moment so it was fastest comparison I could think of although it may not be completely accurate.
A healing spell is only as good as the healer. Some people have a natural capability, others must study and practice. The most well received and widely available forms of healing to learn are herbalism, reiki and qigong.
WhiteRaven, qigong (Chi Kung) is a method to achieve enlightenment. It has therapeutic forms and martial forms, and the mere fact of practice improves overall health. I do Chi Kung, martial and therapeutic forms, my body is very grateful (not much when hitting the rock).
About Reiki ... I have bad opinion, I'm second level. I left when I was told I needed a symbol to work remotely. I had like three or four years doing without symbols or Reiki. I think is all about money.