Want to know about baldness - ask a soldier
First a word of apology. I’m a Brit. Worse, I’m an old Brit with a good memory, so I’m going to bore you all with a trip into the past. In them thar hills of days gone by, we had conscription. All us young men got the privilege of taking the Queen’s shilling and going off to fight in whichever war happened to be going on at the time. And all this BP, that’s Before Propecia which is the only really effective treatment for male-pattern baldness. At the time, most of those affected put it down to suddenly having to wear metal helmets or tight-fitting hats. We assumed it made them sweat more and this made the hair more likely to fall out. In fact, the hair usually grew back again after a while which confirmed our theory. This is not the short hair cut favored by the military, but real baldness. So I hit the books and here I am again with the answer. It turns out that the stress of combat causes hair loss. It’s called telogen effluvium. It’s just a coincidence that some men in the military start to show the conventional pattern baldness called androgenic alopecia which research now shows is caused by a break in the genetic sequence in your body. All these men have to do is take propecia and the hair loss stops. For the soldiers, all they have to do is to stay calm. Pauses for smile. When hostile locals are triggering IEDs on the roadside as you drive past, shooting at you and generally aiming to maim or kill you, it’s not that easy to stay calm. But, until you reduce stress levels, the hair is not going to regrow that fast. Using propecia will have no effect at all. If you cannot control the anxiety, there’s one good thing. Your hair will grow back again when you leave the military - assuming you find civilian life less stressful and assuming you do not also have androgenic alopecia.