Tehran University of Medical Sciences Case Reports in Clinical Practice 2538-2683 11 2 2026 08 29 96 99 Mohadeseh Azadvari Department of Physical Medicine and Rehabilitation, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran. AND Urology Research Center, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran. Fatemeh Guitynavard Urology Research Center, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran. AND Department of Urology, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran. Seyede Zahra Emami-Razavi Department of Physical Medicine and Rehabilitation, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran. AND Joint Reconstruction Research Center (JRRC), Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran. AND Musculoskeletal Imaging Research Center (MIRC), Tehran University of Medical Sciences, Tehran, Iran. 2026 07 11 2026 07 19 Deep vein thrombosis (DVT) is a serious medical problem that usually occurs in people who are immobilized, and its formation is not expected in people who do physical activity such as walking. Arbaeen walking is an event that takes place every year in Iraq over long distances and usually in hot and dry weather. During walking, there is a high probability of dehydration, which can be a risk factor for blood clots in the deep vessels. Since oral contraceptives also increase the possibility of blood clots in the vessels, it seems that women who use oral contraceptives and go for this walk, due to the possibility of concurrent dehydration, are at high risk for DVT. Due to the importance of this issue, we are currently introducing a case of a 44-year-old woman who suffered a DVT while taking a contraceptive while walking on Arbaeen. https://crcp.tums.ac.ir/index.php/crcp/article/view/1218 https://crcp.tums.ac.ir/index.php/crcp/article/download/1218/787