Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Cutaneous amyloidosis presents either as a rippled hyperpigmentation or as raised, itchy papules or plaques. Treatment options are limited. I suggest you to use potent topical steroid cream e.g either Clobetasol Propionate or Betamethasone Dipropionate cream. Treatment is long term and response varies from patient to patient, therefore I suggest you to kindly talk to your local practitioner foe a prescription of the same. Regards.