Menstruation is a normal biological process, yet it continues to be surrounded by myths, taboos, secrecy and discriminatory practices in many parts of India. Such beliefs may restrict women and girls from cooking, entering places of worship, touching water, bathing and participating in social activities in some communities during menstruation. The present paper examines these practices with particular reference to the Theog region of Shimla district, Himachal Pradesh, where the terms ‘Beendki’ and ‘Barrine’ are used in relation to menstruation and where menstruating women may be required to remain separately in cowsheds and depend upon family members for food and water. The paper considers the social, psychological, educational and health consequences of menstrual taboos and highlights the importance of menstrual hygiene, accurate health education, adequate sanitation and community participation.