Major stress like surgery or cancer could result in hair loss, but this is usually temporary and the hair will likely regrow without treatment once the stress has passed.

像手术和癌症的重压可以导致脱发，但是这只不过是暂时的，你的头发在这种治疗上的压力过去后又可以重新长出来。

youdao

I'll never know for sure, because both stress and certain antidepressants can cause hair loss.

我无法知道确切的原因。因为压力和某些抗抑郁药物均可能引起脱发。

youdao

Lifestyle upsets, including severe stress (death in the family, divorce, job loss) and changes in your diet (crash programs, lack of protein), can cause your hair to shed more rapidly than normal.

生活方面的紊乱，包括压力过大(亲属逝世、离婚、失业等)以及饮食不调(速成节食、蛋白质缺乏等)，都可能造成脱发过多。

youdao