Background: Acne vulgaris is a chronic condition which commonly affects adolescents and exerts a psychological burden on its sufferers. Non-adherence to acne treatment is believed to be a major factor contributing to treatment failure. In this study, we characterize the profile of a non-adherent Asian acne patient, and evaluate the relationship between treatment adherence and acne severity and quality of life. Methods: A total of 53 acne patients were recruited from the Dermatology outpatient clinic of National University Hospital, Singapore, and followed up over a 3 month period in this prospective observational study. The Elaboration d’un outil d’evaluation de l’observance (ECOB) adherence assessment tool was used to assess adherence to acne treatment, and acne severity was evaluated using the US Food and Drug Administration Center 5-point Acne Severity Score (ASS). Results: Of the 53 study participants, 29 (54.7%) were non-adherent to acne treatment. There was no significant difference in gender, educational level or acne severity at time of presentation between adherent and non-adherent patients. Adherent patients had a significantly larger improvement in acne severity scores compared to non-adherent patients (change in ASS: -1.33 ± 0.64 vs -0.76 ± 0.83, p = 0.008), but this did not translate to a significant improvement in quality of life. Conclusion: Adherence to acne treatment was not associated with demographic characteristics or acne severity. Factors contributing to adherence to acne treatment are complex and multi-faceted, and individualized motivation and education of each patient may be the method of choice in encouraging treatment adherence.