Spells for healing can be very powerful, but as I always say, never rely just on magick when your health is at stake. Seek medical attention as well. But when you want a little edge over an injury or illness, a little spellwork certainly can't hurt.
These healing spells are a good place to start, and I have additional Wiccan healing spells on another page for some more options.
Herbal Health Poppet
This a poppet spell for healing designed to improve your own personal health, though you could use it to direct healing energy to other people if you wanted (you'll need their hair though).
Make a poppet or small doll out of the white material, sew it up leaving a whole for stuffing. Wrap the strands of hair around the stone, and stuff it into the head of the doll. If the hair is short, don't worry about it, just put the hairs and crystals in the head part together. Stuff the rest of the doll with the herbs, and sew it shut.
In the middle of the chest, draw a circle, then a heart within the circle. Now you have a health charm to leave on your altar or in a quiet spot, until you've gotten over your illness.
Light of Health Spell
This is a really simple spell for healing when you just want a little added boost to get over something that's not too serious (like a cold or a sprained ankle). All you need is a white candle and something to carve into the candle with (like a pointed screwdriver, knife or burin).
Along the side of the candle, scratch in the following runes:
They each symbolize good health, along with success and energy. Inscribe all three symbols a few times, if there is room.
Set up the candle on your altar and light it. Visualize the light flowing through you and bringing you additional healing and good health. Leave the candle to burn out on its own.