New Delhi, June 30 -- Most men don't think much of losing a few hairs in the shower. But one day, without any obvious warning, the drain is clogged and the pillow is covered - and suddenly it feels like something has gone very wrong. That shift from normal shedding to heavy, noticeable hair loss can be concerning, and for many men, it may appear to happen without warning.

In many cases, however, there is an underlying reason, and understanding it is the first step to actually doing something about it.

What "sudden" hair shedding actually means

The scalp holds around 100,000 hair follicles, and at any given time, most of them are actively growing. A small percentage are in a resting phase, and those hairs eventually shed - that's normal...