After washing your hair once with the hotel's bath and shampoo combination, it will become very dry as long as it touches water, and it will be fine when it is dry. How to improve?

Cosmetic allergies are a bit common. People often blame cosmetics for skin allergies. In fact, there are many misunderstandings here! So what is cosmetic skin allergy, how to judge it and how to avoid it? Q: My skin is very sensitive and I am often allergic to some cosmetics. Is there any emergency method? A After applying cosmetics, if there is redness, burning or itching, you can choose other kinds of cosmetics. Once an allergic reaction occurs, don't wash it with hot water, let alone soap. You can gently wash it with cold water and dry it, and then apply some soothing cream. If you have severe inflammation, you must go to the hospital for dermatological examination. Q: I am allergic to spices. What should I pay attention to when buying cosmetics? Many people who are allergic to cosmetics are allergic to spices. It is best to choose cosmetics marked "odorless". However, everyone should pay attention to the differences in English descriptions of products: products marked "without spices" are more reliable and really contain no spices; However, products marked as "not perceived", "odorless" and "low sensitivity" may still contain very low concentrations of spices to mask the natural odor of some components in the products. Q I seldom had allergies before, but after changing a whole set of cosmetics, my face was particularly itchy. What is the reason? It is human nature to love the new and hate the old. Coupled with attractive advertisements and promotions, it is difficult for people not to buy. At the same time, changing a set of cosmetics will expose the skin to many different chemical components, which will not only greatly increase the chances of allergies, but also make it difficult to find out which bottle is the culprit after skin problems. If you really want to buy a full set of products, you'd better buy one or two a month, so that even if there is a problem with your skin, it's easy to find out which product is causing it. I suggest you reuse the original cosmetics and gradually match the newly bought products, so that the skin will have an adaptation process and the risk of allergies will be greatly reduced. Q The beautician told me that the new product is not allergic as long as it is used for three days. I bought a bottle of cream three weeks ago, and I have a rash on my face recently. Is this a cosmetic allergy? Your cream may not be the real reason. Other factors may also cause allergies. Please ask your doctor to judge. However, the beautician's statement is not accurate. Many allergies do not occur when the skin comes into contact with a new process source for the first time, but go through an "induction period", which usually takes several days or a week, but it may also take several weeks or even longer, that is to say, it will take some time before allergic reactions occur. But if you encounter this ingredient again in the future, the time of allergic reaction will be shortened a lot, and eczema will appear on your skin in a few hours or a day or two. If it is allergic skin, when buying new cosmetics, it is best to apply a little behind the ear or inside the arm and observe it for a while before using it. Q Can hair care products also cause facial skin allergies? Hair care products can cause many allergic phenomena. It is worth mentioning that skin allergies caused by shampoo products are sometimes not easy to cause scalp allergies or eczema. Allergies generally appear in the forehead, in front of the ear, behind the ear, neck and other parts where hair is connected with the skin. If you have long hair, your cheeks may also be allergic. Because allergies are manifested on the face, they are often ignored or delayed. Scalp allergy is often related to hair dye. When washing your hair, the hair dye is washed on the skin in other places, so the hair dye is allergic, not only to the scalp, but also to eczema on the face, eyelids, ears and neck. The allergic phenomenon is often very serious. Q Are you allergic to direct application, massage, bathing, sniffing and fumigation of essential oils? A The symptoms of allergic reaction to plant essential oils are generally redness, itching, long-term swelling and even blisters. Generally speaking, daily necessities containing a small amount of essential oil will not cause obvious skin allergic reaction immediately, and most of them are users' own allergic skin. The use of inferior essential oil is also an important cause of allergies. Experts especially pointed out that the composition of plant essential oil is complex, and many people are allergic to plant ingredients. Plant products do not represent gentleness and safety, and the use of plant essential oil products varies from person to person.