When Should You Consult an Expert for Hair Fall? Knowing when to take hair fall seriously, and when to actually see someone about it, is something most people get wrong. The result is what most people call hair fall, but what's actually happening is a breakdown somewhere in the hair cycle. Signs That It's Time to Stop WaitingThere's no single number that tells you when hair fall crosses a line. When hair fall is left unaddressed for a long time, the follicle can miniaturize -- it starts producing thinner, weaker strands and eventually may stop producing hair altogether.