What is the Use of Sanitary Pads? Starting from "What is a Period?" and Discussing How Many Pads Per Day is Normal

First, Understanding the Root: What is a Period?
Simply put, a period is a natural outcome of the cyclical operation of the female reproductive system. Each month, a woman's body prepares for a potential pregnancy. The endometrium (uterine lining) thickens, forming a "nest" rich in blood and nutrients. If fertilization does not occur that month, hormone levels in the body drop. This thickened endometrium is then no longer needed, so it sheds and is expelled from the body. This process of shedding and expulsion is menstruation.
We can use an analogy: the endometrium is like the "soil" prepared each month for a potential "seed" (fertilized egg). If the "seed" doesn't arrive, the "soil" is renewed and replaced in preparation for the next month. The discharged menstrual flow is primarily a mixture of endometrial tissue, blood, and cervical mucus. This is a completely normal and healthy physiological phenomenon, typically occurring in cycles of 21-35 days and lasting 3-7 days.
So, What is the Core Function of a Sanitary Pad?
The most fundamental purpose of a sanitary pad (also called a menstrual pad) is to absorb the menstrual flow discharged from the vagina during the period, lock it inside, prevent leakage, and thereby maintain bodily cleanliness and keep clothing dry, allowing women to carry on with normal activities during their menstrual cycle.However, the design of a qualified sanitary pad goes far beyond just "absorption." From a manufacturing perspective, it must balance several factors:
Safety and Skin-Friendliness: In direct contact with delicate skin, it must use non-irritating, low-allergenic raw materials. The top sheet should be soft and breathable to avoid dampness and friction.
High-Efficiency Absorption and Fluid Locking: The core lies in fast absorption and, more importantly, secure locking. This relies on the internal absorbent core structure—typically composed of materials like superabsorbent polymer (SAP) and high-loft non-woven fabric—which can quickly gel liquid and keep the surface dry.
Fit and Leak Prevention: Designed ergonomically with shapes, along with wings and adhesive backing, to ensure it stays in place during movement and effectively prevents side and back leaks, even during side-sleeping or prolonged sitting.
Answering the Specific Question: How Many Sanitary Pads Per Day is Normal?
This is a very practical question. The answer varies from person to person and from day to day, but there is a general reference range.
Menstrual flow is not the same every day. For most people, it follows a pattern of "heavy to light":
Days 1-2 (Heavy Flow Phase): Flow is usually heaviest right at the start. It may be necessary to use "overnight" or "extra-long" pads and change them every 2-4 hours to maintain optimal hygiene. Calculated this way, one might need to change 5-6 pads per day.
Days 3-4 (Moderate Flow Phase): Flow begins to decrease. Standard "daytime" pads can be used. The frequency of changes can be extended to every 4-6 hours, requiring approximately 3-4 pads per day.
Day 5 Onwards (Light Flow Phase): Nearing the end, there may only be light brown discharge. At this stage, "mini-pads" or "panty liners" can be used with even less frequent changes, around 1-2 pads per day.
The Core Recommendation: Regardless of flow volume, for health reasons, it is best not to use a single sanitary pad for more than 6-8 hours. If on a heavy day you need to change a saturated pad every 1-2 hours, or if you pass large clots, it is advisable to consult a doctor. The key is to listen to your body's signals, choose products with appropriate absorbency, and change them frequently.
As the manufacturers behind the product, our duty is to translate the above considerations for safety, absorption, and comfort into tangible products through material science and precision manufacturing. In the design of a single sanitary pad, you can see not only the function of a consumer product but also the most fundamental respect and care for the female physiological cycle. Understanding it allows for a more composed and scientific experience each month.

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