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

Context: And I did n't care about anyone and just sat down each time the pain was unbearable . Then I 'll take a pack of ice and plaster it over my ankle . After work , we were all in such a good mood that some of us headed down to Geylang to get some food . Suzie , Mei and Ana were in uniform .

Answer:

Because they must have injured it while they were at work .



Why did the author likely put ice on their ankle ?