Barb on elbow may be caused by the following reasons, such as friction, dermatitis, dry skin, psoriasis, etc. You can use moisturizers to take care of the cause of the disease, or anti-itching drugs, immunosuppressants and other medications. 1. Friction: work may rub the arm, resulting in friction stimulation caused by skin thickening, after scratching will appear barb-like things, can use sodium urate ointment or vitamin E to relieve. 2. Dermatitis: because of allergy or inflammation stimulation and lead to dermatitis, will cause local itching and pain, flaking, resulting in arm barbed things, you can use medication, such as dandelephene ointment, mometasone furoate cream and so on. 3. Dry skin: If the skin is dry because of the weather change, it will cause dry and cracked skin, it is suggested that vitamin E can be used. 4. Psoriasis: because of genetic reasons and environmental factors may appear psoriasis, resulting in dry skin to appear skin barb-like phenomenon, need to be under the guidance of the doctor to use medication, such as methotrexate and so on. Usually it is recommended to do a good job of skin protection, choose loose cotton clothes, avoid local friction or inflammation stimulation of the skin, discomfort should be timely consultation, follow the doctor’s instructions for treatment, do not self-medication.