Firstly, It can be due to vit B deficiency
. Take some vitamin
B complex for
some days and see if your symptoms improve.
Secondly, it can be due to atopic dermatitis or eczema("Atopic" refers to a group of diseases where there is often an inherited tendency to develop other allergic conditions, such as asthma and hay fever). Cheilitis(Inflammation of the skin on and around the lips
)is often seen in atopic dermatitis.Diagnosed by blood test like RAST.