Skin is a largest organ of our body, Skin is the general covering of entire external surface of body including external auditory meatus & outer surface of tympanic membrane, it also continuous as mucous membrane at the orifices of the body. Skin is thickest on the palms and soles of the fees (1.5 mm thick), while the thinnest skin found on the eyelids and in the post auricular region (0.05 mm thick). Pigmentation of skin is determined by five pigments i.e. melanin, melanoid, carotene, haemoglobin & oxy harmoglobin present in different layers of skin. In Ayurveda the word "Twacha " or Charma" is used for skin Twacha is derived from "Twak Samvarne" dhatu meaning the covering of the body. Aachaarya Charaka says that all the organs are the modification of Panchamahabahut, so the Rachana and Kriya of these organs have been organised according to their Panchabhautika constitution. Twacha has been counted in Prithvi and Vayu dominant organs.so in this article Ayurvedic approch to Twacha sharir taken for study.
Vd. Yashasvi Khobragade (2026) studied this question.