Changes in lip colour, or lip pigmentation, can be caused by various factors. Excessive sun exposure is a common cause of sun-induced hyperpigmentation. The chemicals in cigarettes can induce lip darkening, and hormonal changes in women during pregnancy can boost the synthesis of melanin, which can lead to pigmentation problems. Few medications, allergies, and underlying medical disorders might also result in lip pigmentation. People with psoriasis or eczema may see changes in their lip colour due to skin-related issues. At Nutriderma, the expert team offers solutions for all types of lip pigmentation.