Children with bell's palsy may experience a partial or complete loss of control over their face muscles on the affected side. It is a serious problem that requires appropriate treatment and rehabilitation. Pediatric nurses, mothers, and children should have the necessary knowledge and attention to address this condition. Aim: evaluate the effect of rehabilitation guidelines on mothers' knowledge, practice and functional recovery of facial muscles for their children with bell's palsy. A quasi-experimental research design was used in order to accomplish the aim of the study. A purposive sampling of 60 mothers and 60 childen with bell's palsy were included in the study. Setting: It was conducted at Pediatric Physiotherapy Therapy Outpatient Clinic at Tanta Main University Hospital. Tools: tool I: Mothers' knowledge regarding bell's palsy, tool II: Bell's palsy rehabilitation reported practices check list and tool III: House Brackmann scale for functional recovery of facial muscles of children with bell's palsy. Results: A statistically significant difference was observed in the mothers^, knowledge and reported practice regarding their children with bell's palsy before, immediately, and after one month after rehabilitation guidelines. Conclusion: The study found an improvement in mothers' knowledge and reported practice towards their children with bell's palsy after rehabilitation guidelines. Children who received the rehabilitation guidelines showed an improvement in functional recovery of facial muscles. Recommendation: Mothers should receive continuous guidelines regarding care for their children with bell's palsy.