External causes include excessive use of hair sprays and gels, improper use of hair-coloring products, cold weather and dry indoor heating, infrequent shampooing of the hair or inadequate rinsing of
the scalp and hair. Regarding
the chapped lips, it can be due to vitamin B deficiency. Take some vitamin B complex esp. Vit B2 and B 12 for some days and see if your symptoms improve.
Secondly, it can be due to atopic dermatitis or eczema. Diagnosed by blood test like RAST.