What should you know about TCA for hyperpigmentation?

Hyperpigmentation means that an area appears darker because skin has produced or retained more pigment. The cause may be irritation, acne, sun exposure, hormonal influence, or another condition. [Dark Patches On Skin](/symptoms/dark-patches-on-skin/) can have several explanations, so treatment should follow an examination rather than a colour match alone.

TCA creates a chemical injury that encourages treated surface cells to shed. If the reaction is too strong, pigment-producing cells may be stimulated during healing, causing darker patches; lighter areas and texture changes are also possible. Active dermatitis, infection, or a recently irritated area may need attention first.

Ask a dermatology clinician to identify the cause, depth, and borders of the pigmentation. Discuss recent sun exposure, products that sting, medicines, cold-sore history, and any tendency toward dark marks after a rash or injury. A clinician may consider a [Chemical Peel](/treatments/aesthetic-procedures/chemical-peel/) or non-peel options such as [Skin Brightening Treatment](/treatments/aesthetic-procedures/skin-brightening-treatment/), [IPL Photofacial](/treatments/laser-and-energy/ipl-photofacial/), [Picosecond Laser Treatment](/treatments/laser-and-energy/picosecond-laser-treatment/), or [Hydroquinone Treatment](/treatments/medical-dermatology/topical-hydroquinone-therapy/).

After treatment, use the advised gentle cleanser and moisturiser, do not peel flakes by hand, and limit direct sun with clothing and broad-spectrum sunscreen. Wait for the skin barrier to settle before restarting irritating active products.

Arrange assessment for a dark patch that is new, rapidly changing, bleeding, crusted, uneven in colour, or different from nearby marks. Contact the treating clinic if pain, swelling, blistering, spreading redness, discharge, or worsening darkening appears after a peel.

Ask what is causing the pigmentation, whether TCA could aggravate it, what preparation is needed, and how you will protect the area while it heals. Ask when a change in colour should be reviewed.