Over time, it is common for pillowcases to acquire a yellowish tone, a phenomenon that can be baffling for many people. However, the science behind this discoloration is simple and, in most cases, completely natural.
The discoloration process is usually due to the accumulation of various fluids and substances that come into contact with the pillow during everyday use. Among these elements, sweat plays a crucial role. During the night, the human body sweats, and this sweat can seep into the pillowcase. In addition to sweat, the natural oils produced by the skin also contribute to this discoloration. These oils, although invisible at first, accumulate over time and react with the fabric fibers, resulting in a yellow tone.
Another contributing factor is saliva. Many people have the habit of sleeping with their mouth open, which causes saliva to transfer to the pillow. The combination of saliva, sweat, and oils creates a cocktail that can permanently stain the pillowcases if not washed regularly.
In addition to bodily fluids, cosmetics and hair care products can also play a role. Certain products, such as creams, lotions, and oils, can easily transfer from the skin or hair to the pillow while sleeping. These products may contain ingredients that react with the fabric of the pillowcase, speeding up the discoloration process.
Proper bedroom hygiene can mitigate this phenomenon. Experts recommend washing pillowcases at least once a week and changing pillows every one or two years. Using protective covers can also help prevent the accumulation of dirt and fluids.
In some cases, yellowed pillowcases may also be indicative of underlying health issues, such as excessive night sweats, which can be a symptom of various conditions. However, in most cases, discoloration of pillowcases is a common problem that can be easily managed with good hygiene practices.
At the end of the day, understanding the causes behind this phenomenon can help people maintain a cleaner and healthier sleep environment, thus extending the life of their pillows and improving the quality of rest.
Referrer: MiMub in Spanish
