Australopithecus afarensis is one of the longest-lived and best-known early human speciesâpaleoanthropologists have uncovered remains from more than 300 individuals ! Found between 3.85 and 2.95 million years ago in Eastern Africa ( Ethiopia , Kenya , Tanzania ) , this species survived for more than 900,000 years , which is over four times as long ...
Contact dermatitis is a rash on the skin that can be itchy, painful, tender swollen and even blistered. Cradle cap is common for infants and causes thick, itchy, crusty, yellow or brown scales on the scalp. Symptoms of dry skin include scaly, rough, itchy, flakey, cracked skin, as well as chapped or cracked lips. Dandruff is a common condition that causes itching and flaking of skin on your scalp. A drug allergy is an allergic reaction to a medication and can cause a rapid heartbeat and difficulty breathing.
By Sava Tang Alcantara. A dry scalp may be a result of using very drying shampoos that strip the hair of its protective oils. Each hair strand is made up of several layers of keratin, or proteins. The scalp also produces sebum, or a layer of oil, similar to what is produced by the skin in other areas of the body. Overshampooing or using a shampoos that strips away the protective oils may result in an itchy, dry scalp that may also become flaky. Using a moisturizing shampoo and appropriate hair conditioner each time you wash your hair may reduce dry scalp.