There is hard block and soft block. Hard block means you have no clue how to continue and so of course you should get help right away. Soft block means you have ideas and are working on it, but - unknown to you - someone else on the team knows exactly how to solve that problem and could solve it for you in a few minutes or you can spend all weeks working out the answer. The soft block is a lot more common - engineers are smart people who can solve complex problems, but we often fail to use the help of someone else who has already solved it. Thus the standup should be able airing problems that you just need to finish typing the solution in. Sometimes someone else will say "I can help you do this faster", others it is just keep working until you get it.