Vitamin A creams are often used in the treatment of acne, pigmentation and photo-ageing. They work by stimulating collagen production and the new growth of blood vessels, as well as unclogging pores. This helps to smooth out fine lines and improve skin clarity. However, vitamin A creams can cause skin irritation with redness and flaking, although this usually settles with time. Getting an eyebrow wax while you’re using a vitamin A cream can cause more redness than usual. To avoid this, try stopping your vitamin A cream five to seven days before a waxing treatment.