Like women, we Celts are more renowned for physical attractiveness and high-spiritedness than for abstract intelligence. As the photo below illustrates, I became a wee bit overenthusiastic whilst hand-conditioning. Things went smoothly until I began working the backfist (uraken), at which point the demon of overzealousness reared its ugly head.
Part of the problems was Yours Truly (hitting too damned hard), and part was the equipment: the bag is just too damned old. The contents have settled, and it's time to refill it. Essentially, I wound up hitting a cinderblock covered by a mere two layers of canvas with the knuckles, while the back of the hand smacked the bunched-up contents of the bag.
I didn't notice anything amiss until two hours later. I'd gone upstairs, slapped a disc of Schubert into the ghetto blaster, and was reading a book on Graeco-Roman art shortly after my workout. Predictably, I fell asleep. When I awoke, I noticed a fairly nasty bruise forming on the back of my hand.
Here comes the surprise. The bruise you see is less than 24 hours old. Note that it's in a rather advanced state of healing. This is because of a true marvel of modern medical science: raw ginger root. I cut two thick slices from a fresh, juicy root, lightly crushed them, and gently massaged the juice into the boo-boo.
The ginger works miracles by itself, but is even more effective when used in combination with dit da jow (for which I'll post a recipe in due time). Assuming that you don't have a traditional Chinese pharmacy in your neck of the woods, you can enhance the effectiveniss of the remedy by putting the root in a mortar, along with a little fresh turmeric root (available at all Oriental groceries and most farmers' markets) and black pepper, grinding them, and making a poultice of the resultant paste. The combination of ginger and turmeric is even more effective than ginger alone, but I wouldn't recommend it to battered wives: the turmeric, while healing the bruise, leaves vivid, yellow stains on the skin.
Although this should go without saying, do not apply and of the aforementioned preparations diectly to broken skin -- unless you mean to practice your kiai as well.