SASLess - self-inflcited wounds:
John Kerry’s ‘self-inflicted’ Purple Heart, Bronze Star
Also:
Recipients don’t have to be recommended for the Purple Heart, as they do for several other military honors. They must be able to document treatment by a medical officer for an injury sustained while attacking or being attacked by hostile forces. Injuries from friendly fire and
self-inflicted wounds count, so long as the accident took place while targeting the enemy.
Also:
'Trying to acquire Purple Hearts' - Washington Times
"During my year in DaNang, a few combatants urged me to verify small abrasions as “wounds” so they could get a Purple Heart. Each freely admitted trying to acquire Purple Hearts as rapidly as possible to take advantage of the policy allowing those with three Purple Hearts to apply to leave Vietnam early. I refused them. But some went shopping for another opinion. Unfortunately, we had some antiwar physicians in Vietnam who were happy to become accomplices in these frauds."
Read more: 'Trying to acquire Purple Hearts' - Washington Times