If you are a leader and under stress and a problem happens with one of your team members, how you can solve it?

There is a good and very effective techniques to solve the problem if you are under stress or not. 

Some problems are very obvious, however others are not so easily identified. As part of an effective problem-solving process, you need to look actively for problems – even when things seem to be running fine. Proactive problem solving helps you avoid emergencies and allows you to be calm and in control when issues arise. You need to collect some information about the problem. What factors contribute to the problem? Who is involved with it? What solutions have been tried before? What do others think about the problem?. If you move forward to find a solution too quickly, you risk relying on imperfect information that's based on assumptions and limited perspectives, so make sure that you research the problem thoroughly. 

I have to separate both of under stress and the people problem, under stress can be solved by getting recreation or talk to your family and friend and the people problem of our team we can try to speak with him and as leader we must to ready to help for each our subordinates.