Lip cosmetic dermatitis:
Cheilitis is an inflammatory condition of the surface of the lips that can occur alone or in combination with stomatitis or perioral eczema. Contact allergic reactions are a common cause of cheilitis. Cosmetics and hygiene products are the most common causes, and are rarely caused by exposure to musical instruments, dental materials, topical medicines or food allergens.
The patch test is most valuable when the erythema of cosmetic dermatitis of the lips extends to the border of the vermilion border. If the top and bottom of the lips, as well as the sides, are affected equally, then the cause is likely to be lip balm or lip grooming products such as lanolin, propolis and propyl gallate and fragrances are the most likely contributing factors . If the lower lip is more affected than the upper lip, toothpaste is the likely cause, and possible allergens are fragrance, cocamidopropyl betaine, or propylene glycol.
Neck cosmetic contact dermatitis:
Shampoo, conditioner, and facial cleanser are rinsed off the face or hair to cause atopic dermatitis in the neck. Perfume is also a common cause of cosmetic contact dermatitis in the neck, which can be seen in the spray sign, that is, circular dermatitis caused by spraying perfume.
Axillary cosmetic contact dermatitis:
Deodorants, antiperspirants, and shaving products are common causes of atopic dermatitis in the armpit. Metal released from razor blades is generally considered a potential cause of axillary allergic dermatitis, but the amount of metal released by razors is often well below the threshold required to cause a reaction, whereas nickel-induced axillary allergic contact Dermatitis is very rare.
Cosmetic dermatitis of the genital area:
The skin of the vulva is more likely to be irritated than the forearm, because of the hyperpigmentation of the skin of the vulva, usually mild erythema of the vulva is not easily visible, and the patient may perceive burning and tingling of the vulva, but the examination is normal. There are more women than men, and the top five allergens are peru balsam, mixed spice, tulu balsam, phenylmercuric acetate and neomycin. The top three allergens were related to fragrance, underscoring the importance of using fragrance-free products on mucocutaneous.
Perianal cosmetic dermatitis:
The most common cause of anal itching is poor post-defecation hygiene or mild incontinence, and patients often use personal care wipes to improve hygiene. Although wipes can solve the initial problem, they also introduce some potential exposure to allergens. The most common allergens in wipes are preservatives, including methylisothiazolinone, methylchloroisothiazolinone , bronopol and iodopropynyl carbamoylbutyrate; other fragrances. Asking about the patient’s history is critical in managing perianal disease.
Cosmetic nail damage:
Beautifying nails is increasingly a part of modern women’s lives. Nail cosmetics are mainly divided into three categories: nail repair products, nail painting products, nail remover products. The main components include organic solvents, resins, dyes, etc. Irritant and sensitizing reactions to nail cosmetic products usually occur farther away from the nail polish. Nails may appear tender, broken, longitudinally or transversely split. In some manicure projects, excessive use of metal instruments or manicure sticks for manicures can lead to loose curling of the nails, causing changes in appearance or lateral loosening of the nails. Acrylic nails are more likely to cause paronychia and pterygium than nail polish. Atopic dermatitis on the face, eyelids, or neck is more common in patients with allergies to nail makeup.
Cosmetic acne refers to the fact that certain cosmetic products have been found to have comedogenic effects. Cosmetics containing acetylated lanolin alcohol, cocoa butter, coconut oil, lanolinic acid and other ingredients are prone to cause acne. Regular use of cosmetics may be a trigger for acne in adolescent girls, and reducing the use of cosmetics can reduce the occurrence of acne.