Based on the context and the answer, generate a question. 

Context: Several months ago I stubbed my toe on our thing you put your feet on that comes with the living room set . I had a gross black mark for months . Well , today I was looking on my toe and noticed that I no longer have a toenail there . I am so glad I did n't know when it came off because I would have thrown up .

Answer:

Because of the trauma to the foot .



What may be the reason why their toenail fell off ?