This is safe orally or on the skin but you need to be 100% sure there is no infection as this remedy can work very quickly in locking the skin, so to speak, and if there is infection, it is locked into the body.

Depending on the wound or what you are treating there are several remedies to be considered.

Hypericum most well known for lacerated wounds where never endings are damaged
Calendula amazing for healing but as I said, be careful
Tetanus used for when the skin has come into contact with severe bacteria/rust etc.
Arnica for bruising also works if you put it in water and spray it on the area. Most remedies can be made into liquid with mineral water and used this way.
Ledum is another wonderful healer for puncture wounds.

Sorry for boring you.