Intense pulsed light (IPL) therapy is a type of light therapy used to treat or remove age spots, sun damage, freckles, birthmarks, varicose veins, and fine lines/wrinkles. IPL therapy uses many wavelengths to fix unwanted skin pigment conditions or vein changes. The light waves pass through the top layer of skin to the targeted lesion, either pigmented or vascular. In IPL treatment for pigment issues. The light heats the pigment cells and destroys them.