Analysis of illness: it can be treated by surgery. The main component of vocal organs is vocal cords, which are located in the middle of laryngeal cavity. Surgical treatment changes the frequency of vocal cord vibration by changing the shape of vocal cord, thus changing the thickness of voice. However, surgery requires certain conditions, and it will have a greater impact if it is not done well. Suggestion: Everyone's timbre has its own characteristics. It doesn't matter whether it's good or not. Maybe many people like your voice. There is no need to take such a big surgical risk to change it. Be confident and believe in yourself. Health is the best.