How long does steroid injection into the skin take to work for lichen simplex chronicus?

Lichen simplex chronicus develops when repeated rubbing or scratching keeps a patch inflamed and thickened. A steroid injected into the affected skin can reduce local inflammation, but the itch-scratch cycle also needs to be interrupted. Less itch may be the first noticeable change. Texture, scaling, and skin markings can remain after the irritation settles and may fade gradually. If the trigger continues, symptoms can return even when the injection initially helps.

Follow the specific aftercare instructions for the treated patch and try not to scratch, rub, or scrub it. Use only products recommended for your skin, since fragrance and irritation can keep the cycle going. Note itch intensity, sleep disruption, scaling, and thickness so your clinician can compare progress. Attend review as advised; controlling the trigger, such as eczema, contact irritation, or habitual rubbing, may be as important as the injection.

Contact your clinician if the patch becomes more painful, hot, swollen, wet, crusted, or rapidly larger. Ask for review if itching remains severe despite treatment or if scratching causes open skin. Report a dent, skin thinning, or a new light or dark area around the injection site so it can be checked.

Ask what may be driving the itch, when the patch should be reassessed, and which skin-care steps can break the scratch cycle. Clarify what to do if symptoms return and whether another diagnosis should be considered if the patch does not improve.