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Lichen Planus: Purple Itchy Bumps Explained
Quick Answer: Lichen planus is an inflammatory autoimmune-pattern condition producing the "4 Ps" — purple, polygonal, pruritic (itchy), papules — classically on wrists, ankles, and lower back, with important variants: oral LP (lacy white mouth patterns needing monitoring), nail and scalp forms (the scarring-alopecia urgency), and the pigmentosus cousin this hub covers separately. Treatment: potent topical steroids for skin lesions, systemic courses for widespread disease, variant-specific protocols — and the reassurance that most cutaneous LP remits within 1–2 years, leaving the PIH that Indian skin then clears slowly.
Recognising the Family
Classic cutaneous LP: flat-topped violaceous shiny papules with fine white surface lines (Wickham striae under the dermatoscope), intensely itchy, koebnerising along scratch lines — wrists and ankles first. Oral LP: lacy white reticulate patterns on inner cheeks, sometimes erosive-painful — the variant needing periodic monitoring (a small long-term risk profile assigns it scheduled reviews) and dental-material-and-medication history. Nail LP: thinning, ridging, and the pterygium changes — early treatment protects nails from permanent damage. Scalp LP (lichen planopilaris): the urgent one — a scarring alopecia where delayed treatment costs follicles permanently (the hair-hub crossover that justifies fast-tracked appointments). Drug-induced lichenoid reactions: the medication-review lane — several common drug classes can produce LP-like eruptions.
The Treatment Architecture
Skin lesions: potent topical steroids as first line (the itch relief doubles as scratch-cycle breaking), intralesional injections for thick resistant plaques, sedating-antihistamine sleep cover during itchy phases. Widespread or stubborn disease: systemic steroid tapers, and steroid-sparing options (retinoid-class, others) for the longer runs. Variant lanes: oral-LP protocols with monitoring calendars; scalp-LP aggressive-early treatment; nail-matrix approaches. The aftermath honesty: LP resolves into prominent PIH on Indian skin — months of fading, supported by the pigmentation protocols once inflammation is confirmed quiet.
FAQs
Is lichen planus contagious or cancer? Neither — inflammatory-autoimmune; the oral variant simply earns monitoring, which reviews provide.
Why is it linked to stress in my experience? Flare-stress associations are commonly reported — management helps; blame doesn't.
Will the dark marks after my bumps fade? Yes, slowly — LP's PIH is famously persistent on Indian skin; the marks protocols support the patience.
My mouth has white lacy lines — same disease? Possibly oral LP — examination confirms, and the monitoring calendar starts there.
Consult Dr Rohit Batra, MD (Dermatology, Venereology & Leprology) at DermaWorld Skin Clinic, Rajouri Garden, New Delhi 📞 Call: 9911100050 | 💬 WhatsApp Us | 📩 Book via Contact Form Clinic: Q-4, Rajouri Garden, New Delhi – 110027 | Also at Sir Ganga Ram Hospital OPD