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Q fever is a disease caused by infection with Coxiella burnetii, a bacterium that affects both humans and animals. This organism is uncommon but may be found in cattle, sheep, goats and other domestic mammals, including cats and dogs. The infection results from inhalation of contaminated particles in the air, and from contact with the vaginal mucus, milk, feces, urine or semen of infected animals. The incubation period is 9-40 days. It is considered possibly the most infectious disease in the world, as a human being can be infected by a single bacterium. wiki Q fever Rash Rashes involve changes in the color or texture of your skin. Considerations. Often, the cause of a rash can be determined from its visible characteristics and other symptoms. A simple rash is called dermatitis, meaning inflammation of the skin. Contact dermatitis is caused by things your skin touches, such as: Dyes and other chemicals in clothing Chemicals in elastic, latex, and rubber products Cosmetics, soaps, and detergents Poison ivy, oak Retinoids Topical Acne Treatment Retinoids are A group of medications for normalizing the follicle cell lifecycle are topical retinoids such as tretinoin (brand name Retin-A), adapalene (brand name Differin), and tazarotene (brand name Tazorac). Like isotretinoin, they are related to vitamin A, but they are administered as topicals and generally have much milder side effects. They can, however, cause significant irritation of the skin. The retinoids appear to influence the cell creation and death lifecycle of cells in the follicle lining. This helps prevent the hyperkeratinization of these cells that can create a blockage. Retinol, a form of vitamin A, has similar but milder effects and is used in many over-the-counter moisturizers and other topical products. Effective topical retinoids have been in use over 30 years but are available only on prescription so are not as widely used as the other topical treatments. Topical retinoids often cause an initial flare up of acne and facial flushing. Sebaceous glands Sebaceous glands secrete an oily substance called sebum (Latin, meaning fat or tallow) that is made of fat (lipids) and the debris of dead fat-producing cells. In the glands, sebum is produced within specialized cells and is released as these cells burst; sebaceous glands are thus classified as holocrine glands. Sebum itself is odorless, but its bacterial breakdown can produce odors. Sebum is one cause of some people experiencing "oily" hair or skin if not washed for several days. Earwax is partly composed of sebum. Sebum acts to protect and waterproof hair and skin, and keep them from becoming dry, brittle, and cracked. It can also inhibit the growth of microorganisms on skin. Sebaceous glands are a branched type of acinar gland, these glands exist in humans throughout the skin except in the palms of the hands and soles of the feet. Sebaceous glands can usually be found in hair-covered areas, where they are connected to hair follicles. The glands deposit sebum on the hairs, and bring it to the skin surface along the hair shaft. The structure consisting of hair, hair follicle, arrector pili muscle, and sebaceous gland is known as a pilosebaceous unit. Sebaceous glands are also found in non-haired areas (glabrous skin) of eyelids, penis, labia minora, and nipples. Here, the sebum traverses ducts which terminate in sweat pores on the surface of the skin. Pores range in size from 50 to 80 μm on average. The inner surface of the lip and the buccal surface of the cheek can potentially contain ectopic sebaceous glands commonly known as Fordyce's spots or Fordyce granules. These occur as yellowish circular dots that form clusters. 80 percent of the population have Fordyce granules and these sebaceous glands are asymptomatic. At the rim of the eyelids, meibomian glands are a specialized form of sebaceous gland. They secrete sebum into the tears coating the eye, to slow evaporation. Sensitive Skin Sensitive skin is a thin or a fine-textured skin. It reacts quickly to both heat and cold; therefore, it sunburns and windburns easily. It is commonly dry, delicate and prone to allergic reactions. Temperature changes, some detergents, cosmetics and alcohol (used on the skin) can all cause irritation, leaving the skin red and blotchy, with visible surface veins. The skin is the largest organ of the human body. Its size (about 20 square feet in an average sized adult) and external location make it susceptible to a wide variety of diseases, disorders, discolorations, and growths, as well as to damage from the environment and the aging process. Skin Tag A skin tag is a common, benign condition which consists of a bit of skin that projects from the surrounding skin and may appear attached to the skin. Skin tags can vary quite a bit in appearance. They may be smooth or irregular, flesh colored or more deeply pigmented, and either simply be raised above the surrounding skin or have a stalk so that the skin tag hangs from the skin. Americans spend billions of dollars each year on skin care products that promise to erase wrinkles, lighten age spots, and eliminate itching, flaking, or redness. But the simplest and cheapest way to keep your skin healthy and young looking is to stay out of the sun. Sunlight is a major cause of the skin changes we think of as aging — changes such as wrinkles, dryness, and age spots. Your skin does change with age. For example, you sweat less, leading to increased dryness. As your skin ages, it becomes thinner and loses fat, so it looks less plump and smooth. Underlying structures — veins and bones in particular — become more prominent. Your skin can take longer to heal when injured. Skin Treatment The skin on your face is exposed to a barrage of toxins and environmental damage on a daily basis. It must withstand pollution, ultraviolet rays, wind, and debris, as well as the harmful chemicals in 99% of all skin care products and cosmetics. The skin on your face is the most delicate skin on your body. Therefore there are many specialty products that have been developed specifically for your facial skin. It can be difficult to decipher which products perform which tasks, and which products would work the best with your skin type. |
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