Bumps on skin, not itchy, BKA

Bumps started on left upper hand, traveled up arm, appeared on other hand, residual limb (leg stump), etc. also on tummy area in one horizontal linear line. Not super itchy (3 on a scale of 10). Never had skin issues and never needed lotion but have been applying lubriderm since symptoms started. Took steroid my doctor prescribed but did not help (2 days since last dose). My doctor isn’t very helpful at the moment.