Trope Workshop:Enlistment-Ending Minor Malaise

"I've got eyes like a bat and my feet are flat And my asthma's getting worse"

- Phil Ochs, "Draft Dodger Rag"

An Enlistment-Ending Minor Malaise is when a character is rejected from or discharged from the military for what, in normal life, is a very minor health problem. This is typically used to explain why Awesome McCoolname, despite being strong, athletic, good at fighting, calm under pressure, and an unflinching patriot, is not (and possibly never was) in the military. These problems can kill a character's military prospects, but won't seriously interfere with his adventures.

If the setting is during a state of total warfare, this can avoid implying the character is Draft Dodging. This can be a case of Informed Flaw. A Ruptured Appendix is a medical condition with no real long term consequence, though generally won't qualify for this. Some vision problems are still disqualifying from service even if they can be corrected with the right prescription lens. Flat feet is the classic impediment to enlistment, in part because of how ridiculous it sounds.

Literature

 * Owen Pitt of Monster Hunter International was raised to be a perfect soldier by his decorated veteran father . When it came time to enlist, Owen was rejected for childhood asthma (which he no longer has) and flatfoot. Effectively free of his father's harsh training, Owen decides to become an accountant to get as far as possible from soldiery, until an encounter with his serial killer werewolf boss thrusts him into the world of professional monster hunting. Aside from being a poor runner, which is as much attributable to his massive size and heavy gear as it is his flatfoot, these health problems cause Owen little trouble.
 * John Abbott of Abbott in Darkness is unable to continue the family tradition of being military pilots due to being diagnosed with Marfan Syndrome, rendering him unable to endure pulling Gs.

Live-Action TV

 * While most of the Dad's Army cast are relegated to the Home Guard for clear cases of being too old for military service, its younger members are in the Home Guard instead of the army due to examples of this. Joe Walker is allergic to ration staple corned beef (though the loss in a BBC archive purge of its debut episode The Loneliness of the Long Distance Walker and his Black Marketeer stats give many the impression it's fake) while Frank Pike has a rare blood type.

Western Animation

 * In at least one WWII-vintage Looney Tunes cartoon, Bugs Bunny was apparently rejected for military service (the sole of one foot is stamped "4F") for something so minor that it didn't prevent him from performing his usual antics.

Real Life

 * Nearly occurred with American Admiral and long distance marksmanship champion Willis Augustus "Ching" Lee, who very much needed glasses due to his childhood adventures in bomb making. Despite high marks at the naval academy, a vision test near the end would have gotten him dismissed, had the rest of the class not gathered together to help him cheat at it. He would go on to be a thoroughly excellent Admiral and his career only ended when he died in an accident seven days before the end of World War II.
 * Former President of the United States Donald Trump was spared participation in the Vietnam War in 1968 when his podiatrist diagnosed him with heel spurs. This painful condition that makes walking difficult appears to have resolved itself shortly after the war ended.