[custom_adv] Perspiration, also known as sweating, is the production of fluids secreted by the sweat glands in the skin of mammals. Two types of sweat glands can be found in humans: eccrine glands and apocrine glands. The eccrine sweat glands are distributed over much of the body. [custom_adv] Cell phones (including smartphones) give off a form of energy known as radiofrequency (RF) waves, so some concerns have been raised about the safety of cell phone use. With respect to cancer, concern focuses on whether cell phones might increase the risk of brain tumors or other tumors in the head and neck area. [custom_adv] Many softener manufacturers do not go into detail about the compounds they use to help soften fabric. Unfortunately, many softeners are made from a wide mixture of chemicals that can have potentially hazardous effects on the human body over time. [custom_adv] Sunlight damages human skin, resulting in a wrinkled appearance. Since natural sunlight is polychromatic, its ultimate effects on the human skin are the result of not only the action of each wavelength separately, but also interactions among the many wavelengths, including UV, visible light, and infrared (IR). [custom_adv] Anxiety is your body’s natural response to stress. It’s a feeling of fear or apprehension about what’s to come. The first day of school, going to a job interview, or giving a speech may cause most people to feel fearful and nervous. [custom_adv] Henna tattoos are often applied during religious celebrations - such as weddings and holy days. It's important to distinguish between the usually safe, age-old orange natural henna, and the dangerous new black henna. [custom_adv] Woolen is a type of yarn made from carded wool. Woolen yarn is soft, light, stretchy, and full of air. It is thus a good insulator, and makes a good knitting yarn. [custom_adv] Nickel contact dermatitis. The development of an itchy eczematous eruption near the umbilicus is virtually pathognomonic for contact dermatitis to nickel. The source is the small metal snap in the blue jeans or the metal belt buckle. [custom_adv] Although oily skin can clog pores and lead to increased acne breakouts, oily skin also has many benefits. Oil helps preserve the skin, and people with oily skin tend to have thicker skin and fewer wrinkles.