Not all excessive sweating is the same. And in fact, sometimes profuse sweating can be a sign of something very serious. Learn more about the two types of hyperhidrosis here. Whether you have primary focal hyperhidrosis or generalized secondary hyperhidrosis, we have incredible resources for you here at the International Hyperhidrosis Society and we hope you'll explore this website thoroughly.
As you do so, you'll even find important info about sweat issues you've probably never heard of before, including not sweating at all, colored sweat, bloody sweat, smelly sweat. Illustration explanation: The skin is composed of an epidermal layer E from which hair follicles H , sweat glands G , and sebaceous glands S descend into the underlying dermis D. Patients Family and Friends. Medical Professionals.
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During puberty, various hormones cause them to produce a lot of sebum and this therefore contributes to oily skin. If a duct of a sebaceous gland is clogged with sebum, a whitehead results. If this material is allowed to dry and oxidize, it will become darker, forming a blackhead. If a sebaceous gland becomes infected, moderate and severe forms of acne are the result.
The glands lining the ear canal that produce earwax cerumen are called ceruminous glands. They are modified sebaceous glands. The fingernail is an important structure made of keratin. The fingernail generally serves two purposes: it acts as a protective plate and enhances sensation of the fingertip. Nails can also help grasp small things. The protection function of the fingernail is commonly known, but the sensation function is equally important.
The fingertip has many nerve endings in it that allow it to receive volumes of information about the objects we touch. The nail acts as a counterforce to the fingertip, providing even more sensory input when an object is touched. Nails grow from the nail bed continuously but they slow down their growth rate with age, poor nutrition, or poor circulation. The nail sinus sinus unguis is where the nail root is—at the base of the nail underneath the skin. It originates from the actively growing tissue below, the matrix.
The root of the fingernail is also known as the germinal matrix. This portion of the nail is actually beneath the skin, behind the fingernail, and extends several millimeters into the finger. The fingernail root produces most of the volume of the nail and the nail bed. This portion of the nail does not have any melanocytes, or melanin-producing cells.
The edge of the germinal matrix is seen as a white, crescent shaped structure called the lunula. The nail bed is a part of the nail matrix called the sterile matrix. It extends from the edge of the germinal matrix, or lunula, to the hyponychium. The nail bed contains the blood vessels, nerves, and melanocytes, or melanin-producing cells.
As the nail is produced by the root, it streams down along the nail bed, which adds material to the undersurface of the nail and makes it thicker. The nail plate is the actual fingernail, composed of translucent keratin. The pink appearance of the nail comes from the blood vessels underneath the nail.
The underneath surface of the nail plate has grooves along the length of the nail that help anchor it to the nail bed. The free margin or distal edge is the anterior margin of the nail plate corresponding to the abrasive or cutting edge of the nail. The eponychium, or cuticle, is situated between the skin of the finger; the nail plate fuses these structures together and provides a waterproof barrier.
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