But do be careful, if a bite refuses to heal it could be becoming systemic, in which case it needs prompt action from a competent doctor if it is not to become much worse. I had this a couple of years ago, and only the fourth doctor I consulted (Dr. Lerida Rodriguez) knew what treatment was needed.

Of course, the best curative is to avoid being bitten in the first place. A good anti-bug lotion is called for.