Some autistic people use strategies to hide autistic behaviour and appear more neurotypical. Previous research has linked this 'social camouflaging' with mental health difficulties. This review synthesised qualitative research to explore the relationship between camouflaging and mental health. Thirteen studies were systematically identified, appraised and synthesised using meta-ethnography. Four third-order concepts were developed, describing camouflaging as an attempt to cope with stressful social contexts which impact mental health. Many autistic people experienced unintended negative consequences of their camouflaging that increased stress. Potential mechanisms for the relationship between camouflaging and mental health related to the qualities of the strategies that were used. Camouflaging strategies that were superficially 'successful' involved high levels of self-monitoring, were highly cognitively demanding or highly habitual and appeared more linked to poor mental health. This should be investigated in future research and has potential implications for how clinicians support autistic people with mental health difficulties.