First, read the English article below.

Remember, seemingly random erections are normal and no reason for concern, and odds are that no one has noticed anyway. Take a few deep breaths, and keep calm. Worrying about your erection can cause you to focus even more on it and make it more difficult to end.  That said, anxiety can actually be to your benefit in ending an erection. Stress causes a "fight or flight" reaction in the body, which includes the redistribution of blood towards the arms and legs. The sympathetic nervous system is also involved in erections. Drawing blood away from your genitals can help end your erection.  So, the best advice may be not to worry about having an erection, but feel free to worry about other things that may distract and deflate your problem. You may have heard the old joke that men have only enough blood to supply either their brains or their penises at any one time, but there is some validity to the idea that distracting the mind can help bring about penile detumescence (the return of a penis to its flaccid state).  Try to occupy your mind with something besides sex, but don't try to forget about your erection. In other words, don't think to yourself, "OK, I'm thinking about baseball now. Definitely not my erection." Your erection won't go away until you are fully focused on something else. Force yourself to perform a task that takes a lot of mental concentration: play a musical instrument, read, exercise, or solve a math problem. If you can't distract yourself by doing an activity, try to visualize the activity in your head. If you're in a social situation and you can't distract yourself without arousing suspicion, imagine yourself doing something different. If you love playing guitar, imagine every little detail: where you're putting your fingers, how you're strumming, how the song sounds. Sometimes, the best way to distract yourself is to go somewhere else for a while. If the erection was triggered by someone or something in the room, it might be difficult to end it until you leave the room. Give yourself five... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Thư giãn hoặc lợi dụng chính sự bồn chồn của bạn. Cố gắng tập trung vào việc gì đó phức tạp nhưng không gợi dục. Thay đổi khung cảnh. Tự làm mình đau nhẹ.