The twang is a very fine, even rupture sound, like the sound you make when you twist a strand of hair around your ear with your fingers. Gas gangrene is a severe acute atopic infection caused by Clostridium perfringens. Depending on the extent of the lesion; Clostridium perfringens infections are divided into two categories: Clostridium myonecrosis and Clostridium cellulitis, commonly referred to as gas gangrene or Clostridium myonecrosis, which occurs mainly in patients with extensive damage to muscle tissue, with a few occurring in the abdomen or perineum after surgery. Prevention: It is important to enhance physical fitness and prevent upper respiratory tract infections to protect the voice; workers who use the voice for a long time must know the correct vocal method, do not abuse the voice, and use the voice appropriately; men who change their voice during puberty should reduce the time for voice practice; women who have menstruation should pay attention to vocal rest as the vocal cords can become congested and edematous; avoid smoking and alcohol, spicy and other irritating foods, harmful gases and dust. Avoid spicy food, harmful gas and dust to protect the vocal organs.