Hi and thanks for the query, It could be interesting to actually do a more detailed medical evaluation. Bleeding from multiple sites, the skin and the nose should warrant exclusion of an associated medical condition. A complete blood count could be a good start t ascertain that the number of platelets are i sufficient numbers. Itchy skin lesions could be due to an allergic reaction. But persistence of these lesions on anti histaminics, without nay dominant classical allergy associated symptoms like itchiness and rapid spread should warrant considering other causes. Fungal infections, bacteria and viral sources could be at the origin. I suggest you consult an internist for a more comprehensive analysis of your health status and management. Thanks for the query and best regards, Luchuo, MD.