First of all don't use any medication without consulting your doc; as it may affect yr baby. There are number of reasons for yr problem. Low Hemoglobin
. High sugar level(pregnancy diabetes
hormone level are important causes. You may be allergic to contactant like fabric, antibacterial washes.Stop all bath soaps , hot water washes ,avoid friction,use loose garments.You can take Tab. Avil twice/thrice daily with topical sofradex-f .