Scientists do not know the cause of most forms of myositis. For this reason, there are no official guidelines for preventing myositis.
Only infectious myositis and drug-induced myositis are potentially preventable. To help prevent these illnesses:
Get a flu shot each year.
Thoroughly cook pork and other meats.
Never inject illegal drugs under your skin or into your muscles. With prescription drugs that are injected, the injection site should be as clean as possible.
Keep your skin clean.
Take the lowest number and lowest doses of medications that are necessary. Routine blood tests to look for drug-induced muscle injury may be helpful as well.