Try a shampoo with tea tree oil in it. Tea tree oil is known to be a pretty good at killing fungus, bacteria, virus's, etc. It might help kill off any fungal infection, etc. you may have. You can also find a little bottle of it at most health food/vitamin shops if you want to add it to your own shampoo. I've done that to my body lotion before. But, if you have open sores on your head, I'd probably wait for them to heal a bit before trying this method.