Ultrasound scanning is becoming an important diagnostic tool in dermatology. The aim of the present study was to evaluate the accuracy of sonographic diagnosis of eight different skin disorders namely, morphea, lichen planus, psoriasis, haemangioma, keloid, seborrheic keratosis, chronic eczema and lastly photo-aged skin. Fifty seven patients with the previously mentioned skin disorders were studied by ultrasound biomicroscopy (UBM). In the morphea patients, the echogenicity of dermis is increased and the thickness of morphea plaques measured by UBM can be used as a parameter for disease severity. In lichen planus and chronic eczema patients, the dermis appeared as sound shadow, hence we can use UBM for follow-up of the therapeutic effect of treatment e.g. topical corticosteroids through the change in echogenicity of the lesions.On imaging psoriasis plaques, there was an intermediate zone between the epidermis and dermis which was named “B zone”, its thickness can be used as a measure for psoriasis severity and the efficacy of anti-psoriasis treatment. In all haemangioma patients, lesions appeared hypoechoic, change in echogenicity can evaluate the effectiveness of pulsed dye laser in treatment of portwine stains. On scanning, keloids appeared as low echogenic image. On imaging, seborrheic keratosis appeared as a sound shadow due to the phenomenon of attenuation of sound.Imaging of photo-aged skin revealed a subepidermal low echogenic band (SLEB) which can be used as a parameter for severity of photo-aging and the efficacy of antiaging preparations. In conclusion, UBM is a promising diagnostic tool in dermatology.