why does my period blood smell so bad

The bad smell of period blood is usually caused by a combination of factors including the natural presence of bacteria in the vagina, how long the blood stays inside or on sanitary products, and the iron content of the blood itself. Menstrual blood has iron which can create a metallic smell as it oxidizes when exposed to air. Bacteria mixing with the blood can produce various odors, which can sometimes become stronger or unpleasant if hygiene is not maintained or if the blood stays for extended periods. Hormonal changes affecting vaginal pH levels may also influence odor. A particularly strong or unusual smell, such as fishy or rotten, can indicate an infection like bacterial vaginosis or a retained tampon, which requires medical attention. Normal period blood smell is often metallic or musky, but if the odor is very foul or accompanied by other symptoms like irritation, discharge changes, or discomfort, consulting a healthcare provider is recommended.