There are MANY realistic healing arts, from channeling energy, drawing amplifying, and aiming it at the sick (various styles from Reiki to Praunic to \"spiritual healing\" and laying on of hands), various herbs, minerals, stones (ground and ingested OR worn on the body using the \"vibration\" of the stone to adjust the injured or ill persons \"vibration\" to more healthy), pins and needles ALA acupunture, massage (from Rolfing to Swedish, to accupressure of the hands, feet, face and basically ANY accupuncture site can also be more mildly \"activated\" by pressure on the site.
The forms of NON medical healing are as VAST as the variety of people that use them. I have tried many of them for problems from Hyperactivity when I was a child (Acupressure, and accupuncture work WELL with ADHD kids), to insomnia as an adult (Valerian is an herb that is available over the counter and is gentle and effective, other herbs that work for this are Chamomile, cat nip, Kava Kava Etc). I have used and am atuned for Reiki (level one only) and have eased brused, slowed the flow from a bloody nose, calmed a paniced child and eased the suffering during colds and flu (person\'s spirit would NOT allow anything more, and had never been asked to try it before). I carry various gemstones (most semi precious or NOT jewelry quality precious) that affect my moods, help clear thinking, give encouragement, inhance joy and other emotions (Lapidalite is a purple/lavender...sometimes flaking gem that calms, gives peace and emotional stability...which is NOT surprising since it has a HIGH concentration of the element Lithium...CAUTION keep this gem OUT of your mouth and keep away from children. If you are allergic to lithium or taking meds for Biopolar it is best to carry it in a bag.)
In game, I think laying on of hands would be a more Earthy based healing, and accupuncture would be a more cerebral or \"thinking\" form.
Alchemy would be more of herbs and minerals and MIGHT relate differently for the Rock people race than the carbon based races. potions could be JUST herbs.