What Is Considered Extreme Hair Loss?

This sounds simple and but I’m really quite curious. What would you consider rapid and abnormal hairloss for someone in their twenties? One month, two months, half a year, a year? I’ve noticed an extreme amount of thinning over a month period and then none for the past 5 months ( what I would consider normal hair loss, very similar to before the extreme thinning)? Help!

I’m not sure I follow your question. Are you suggesting that hair loss occurs for a month or two and then stops… and cycles that way? That’s not how it works. Normal hair loss reflects hair cycling, which can account for 100-150 hairs falling out per day. There are no general rules about what is considered extreme, but if you are concerned then take charge and either see a doctor or check out your own hair for miniaturization (see Mapping Your Own Scalp).