The present invention provides novel herbal nano emulsion based formulations comprising a combination of lemon juice and/or rose water as therapeutically active aqueous phase entrapped in oil phase selected from one or more essential oils and process for the preparation of the same in pharmaceutically acceptable dosage forms for topical treatment of acne and other skin disorder like eczema, psoriasis, aging scaring and the like with increased efficacy, improved percutaneous penetration, excellent thermodynamic stability ensuring long shelf life, low skin irritation and reservoir effect that promotes drug localization in the skin enabling controlled delivery of the said therapeutic agents.