What is the best thing to help a severe wound heal well?

The keys to healing are simple. Put the injured part at rest so that there is not a lot of stress and strain on the tissues, keep the wound moist (remember that the tissues below the skin are moist which is how cells move and important healing factors get from the tissues tot he injured area) [DO NOT LET THE AIR GET TO IT AS THIS CAUSES DRYNESS WHICH SLOWS DOWN HEALING!!}. Use a clean (sterile is not necessary as all wounds are contaminated and sterile costs money which is just not needed) . Avoid anything that causes pain or irritates the wound as pain is a sign that the wound is not happy (such as salt, peroxide, alcohol, Betadine). There re many fine wound dressings including those with honey that help things heal but dressing changes should be every other to every third day to allow for the wound to start the healing without being disrupted by removing the dressings too often. These basics will help it heal the fastest.

Clean the wound with soap and water. Then apply some salt either directly or in water other alternatives could be essential oils or some lavendar. Wrap injury in a sterile bandage , depending on the severity of the injury if minor leave bandage on for a day or so making sure it does not get dirty.If more severe change it every fre hours

...manuka honey is excellent for wound healing as it is a natural antibiotic, apply directly to wound (it is now beginning to be used in NHS incorporated into wound dressings) lots of info on internet (it is something of a miracle so do check it out) or go to your local health food store...collodial silver is also a natural antibiotic, it's anti-viral, anti-fungal and builds up the immune system if taken daily...blessings & well healing to you.