The emergence of Streptococcal toxic shock-like syndrome (STSS) poses a global health challenge after the COVID-19 pandemic. As of June 2024, the number of STSS cases in Japan has risen to 977, surpassing the previous year’s total. Streptococcus pyogenes (group A strep) can cause superficial infections as well as more severe conditions, including necrotizing fasciitis and STSS. It mainly spreads through respiratory droplets and open wounds, with overcrowded living conditions and poor sanitation exacerbating transmission. With no definitive treatment currently available, good hygiene and effective clinical management is the key to prevention. Public education on risk factors and preventive measures, as well as disease monitoring and adherence to treatment guidelines is crucial in reducing transmission and preventing the development of complications. The potential for STSS to transform into a global pandemic necessitates international cooperation in taking actions to limit the disease. Improved healthcare infrastructure and proactive public health measures can help mitigate the risk of another global health crisis.