What should you know about dark lines under eyes?

The appearance can be brown, grey, blue, or red-brown depending on skin tone and the tissue beneath the eye. Lack of sleep can make shadows more noticeable, but it is not the only explanation. Rubbing from eczema, allergies, or dryness can irritate delicate skin and deepen colour over time. Hollowing at the tear trough can cast a line-like shadow even when the skin itself is not darker. Atopic dermatitis may cause itchy, inflamed skin around the eyes, while tear trough hollows can change facial shading.

Use a gentle, fragrance-free cleanser and moisturiser around the eye area, avoiding the lash line. Do not scrub, scratch, or use strong lightening products without professional guidance. Sunglasses and broad-spectrum sunscreen can reduce ultraviolet exposure on the surrounding skin. If itching, scaling, watering, or a new product is involved, stop the suspected irritant and arrange a dermatology assessment. A clinician can distinguish pigment from shadowing and discuss options such as an appropriate topical plan or under-eye filler when hollows are a major contributor.

Seek prompt medical advice if the change is sudden, affects one eye, or comes with swelling, pain, marked redness, discharge, vision change, or a rash that is spreading. Arrange a routine review when the lines persist despite gentle care, repeatedly itch, or begin after a new medicine or cosmetic product. Assessment is especially useful before applying treatment close to the eyes.

Ask whether the colour is caused mainly by pigment, visible vessels, irritation, or a tear-trough shadow. Ask which products are suitable for your eyelid skin, whether allergy or dermatitis needs treatment, and which cosmetic options have risks in your specific anatomy.