My youngest is tube-fed (she was a micro-preemie, almost 5 years old now and still not eating) and she has what is known as a Mic-key, which is essentially a functional body piercing that allows a feeding tube extension to be clicked in so her special prescription formula/medications can go straight into her stomach. Recently she was ill, seeming to have conjunctivitis. Well, that infection quickly spread to her Mic-key site. It was very sensitive and oozy, and she struggle to keep me from touching it which made it hard to feed her. Her father made an appointment with her pediatric GI, but until she could get to the doctor, I used lavender oil. (I told her it was "Princess Flower Oil".) It helped keep the infection from getting worse, as well as calming her enough that I could feed her.
I've used both heal-all and plantain in salves and poultices. If you are wildcrafting, just check the leaves and blossoms to be sure you have a positive identification. Purple dead nettle (Lamium purpureum) is easily mistaken for heal-all (Prunella vulgaris). It's not harmful, in fact has its own, similar, beneficial properties. (It's great for stopping bleeding.) It's just not heal-all. If the leaves are kind of heart-shaped with a velvet-purple tinge towards the stem, you have dead nettle (called "dead" nettle because its leaves resemble a nettle's and it doesn't sting.) The flowers are a little different, too, heal-all flowering in more of a spike but these plants are still mistaken for each other all the time. (I've done it!)
Another wild healer that is often mistaken for the other two is ground ivy, or cat's paw (Glechoma hederacea) which is good for cuts but even better for bruises. It has similar tiny purple flowers, but creeps along the ground or up fenceposts and so on (not a true ivy!) and has characteristic round, scalloped leaves reminiscent of a cat's paw. Any or all of these three purple-flowered healers can be made into a wonderful, effective salve, plaster or poultice with either or both of the plantains (Plantago major or P. lanceolata) for the treatment of wounds.