Sir,The report on ‘necrotising fasciitis (NF)’ is very interesting.[1] Xavier et al. mentioned that ‘NF should be suspected in post-varicella cellulitis, not responding to adequate antibiotic therapy'[1] and also concluded that ‘Laboratory Risk Indicator for Necrotising Fasciitis score aids in early diagnosis, where imaging studies are pending'.[1] Indeed, the varicella is not an uncommon viral infection. This infection is seen worldwide. The risk factors for post-varicella NF are an interesting topic. As noted by Lim and Huntley, ‘although rare, musculoskeletal sequelae (osteomyelitis, septic arthritis, pyomyositis and NF) can occur in otherwise healthy children'.[2] This varicella complication should be well monitored in all cases. Sometimes, the other deadly concomitant complications such as respiratory tract problem can also be seen.[3] Finally, although varicella vaccine is available, the infection in case receiving vaccination is possible[4] and this can be the most difficult case to diagnose if the post-varicella NF occurs.