Sharing hopes, dreams and even secrets with your friends is less risky than sharing cosmetic products, as per the dermatologists. Not only the cosmetic products, but even the accessories used to apply them like brushes and applicators can easily trade bacteria from one skin to another. Cosmetic allergies are more popular these days and this occurs by using wrong cosmetic products. It may particularly be unsuitable for your skin types. Irritant Contact Dermatitis and Allergic Contact Dermatitis are the two kinds of allergies caused by using inappropriate cosmetics. 
We will, however, focus our discussion on skin infections caused by cosmetics. It is also important for you to know common mistakes people tend to make while using cosmetic products. Here are three ways by which skin infections can occur by inappropriate use of cosmetics:
1. Sharing products: As mentioned above sharing anything is less dangerous than sharing cosmetics with anyone. People are often seen testing various cosmetics before purchasing them; this might makes it easy to judge the consistency, odor and color of the product, but at the risk of your skin. Testing those sample cosmetic will definitely leave you vulnerable with couple of viral infections. Ophthalmologists warn that precautions should be taken while testing lip and eye products, especially because they are greatest source of ailments like conjunctivitis.
2. Using beauty products longer than you should: If you are still using a five months old eye liner and lip shade just because it is very expensive, then its time to pull your sleeves and throw them right now. Cosmetics can never cost more than your skin. Not getting rid of products before the mentioned time limit can lead to skin infections without any doubts. Keep a note that liquid makeup get old faster than powder products. Also make it a point to clean your makeup collection regularly. Generally, the shelf life of a product begins once you open it but some organic products have their expiry dates mentioned on them already. There are many harmful effects of using expired products like: skin infections, allergic reactions, rashes, skin discoloration and eye infections.
3. Using cosmetics that are not compatible with your skin type: Although cosmetics help us feel more beautiful, they can be cause of skin allergies if not used properly. The two reactions, that might occur if your skin is too sensitive, are; Irritant contact dermatitis and allergic contact dermatitis. The former one is more common than the latter. It starts when any harsh ingredient damages the skin. It occurs mostly in areas were skin is thinner like under eyes or where the skin is susceptible to crack.
Allergic contact dermatitis occurs when skin is sensitive to a particular type of ingredient. It starts with redness and swelling. The symptoms might not appear immediately and may take several weeks, after the exposure to develop. To prevent such reactions first test your skin type and then make sure you use only those products that are friendly to your skin. Choose simple products with simple formulations if skin is too sensitive because sometimes your skin is not able to handle multiple ingredients together. You are now aware that swapping cosmetics equals trading bacteria and using products longer just because they are too expensive is not a wise move. Following right skin care regimen will definitely help treating any skin infection caused by cosmetics.
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