Many regulatory organizations in North America do n't allow a boxer to fight again for 30 to 90 days after a knockout .
In Thailand a Muay Thai fighter will frequently fight again only a few days after a KO .
Many regulatory organizations in North America do n't allow a boxer to fight again for 30 to 90 days after a knockout , but in Thailand a Muay Thai fighter will frequently fight again only a few days after a KO .