Buying Pads really late at Acme. A tampon is a plug of cotton or other absorbent material inserted into a body cavity or wound to absorb bodily fluid. The most common type in daily use (and the topic of the remainder of this article) is a usually disposable plug that is designed to be inserted into the vagina during menstruation to absorb the flow of blood. The use of these devices has occasionally caused infection and (rarely) death (see Toxic shock syndrome). In the United States, the Food and Drug Administration (FDA) regulates tampons as medical devices. Tampons come in various sizes, which are related to their absorbency ratings and packaging.
The shape of all tampons is basically the same; long rounded cylinders. Tampons sold in the United States are made of cotton, rayon, or a blend of the two. Tampons are sold individually wrapped to keep them clean, although they are not sterile, nor are tampon companies required by law to list the ingredients in them. They have a string for ease of removal, and may be packaged inside an applicator to aid insertion.
Tampon applicators may be made of plastic or cardboard, and are similar in design to a syringe. The applicator consists of a bigger tube and a narrower tube. The bigger tube has a smooth surface and a round end for easier insertion. Some applicators have a star shape opening at the round end, others are open ended. The tampon itself rests inside the bigger tube, near the open end. The narrower tube is nested inside the other end of the bigger tube. The open end of the bigger tube is placed and held in the vagina, then the narrower tube is pushed into the bigger tube (typically using a finger) pushing the tampon through and into the vagina. If not inserted at a 45 degree angle it can cause discomfort and make removal difficult.
Digital or non-applicator tampons are tampons sold without applicators; these are simply unwrapped and pushed into the vagina with the fingers. Stick tampons are also available.
Probiotic tampons are available in Europe. These tampons can help prevent or cure vaginal infections, like Bacterial Vaginosis and/ or Candida, by strengthening the natural microbiotic vaginal flora. These tampons include probiotics, or three strains of lactic acid bacteria, which naturally occur in the healthy vagina. The vaginal flora of a healthy woman is dominated by lactic acid bacteria, which produce lactic acid as part of their metabolism. The lactic acid makes the vagina acidic, about pH 3.8 to 4.2. Most pathogens do not thrive in such an acidic environment. Therefore, lactic acid bacteria are part of the human female’s first line of defense against infection.
It is usually not necessary to remove a tampon before urinating or having a bowel movement. ampons are a menstrual device worn completely inside the vaginal canal with the exception of the string. This makes them suitable for wear during activities such as swimming. Menstrual blood is not exposed to the air with the use of tampons, so there is limited odor. There is no way to see that a woman is using a tampon when she is clothed, unlike sanitary napkins, which have outlines that can sometimes be seen through fabric. As a disposable product, there is no need to wash anything in between use. Info from Wikapedia

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