It's possible that you may experience a total relief of pain, only to find that a short while later the pain will seem to have increased. This is a phenomenon known as "rebound," where the condition may worsen before it gradually improves the next day.
四、治療當時，感覺症狀全消，當晚卻感到更加疼痛，這是反彈現象，第二天會慢慢改善。