hi, first try a antihistermeen to reduce the amount you react to the irritant.
also hot showers are more likly to increase the reaction as it opens the skin pores, try cool showers as it incurafes your skin to close pores and can help with the iching.
also try useing a second rice when you wash your bedding and cloths to reduce the amount of condisoner lefft on the materal. also use the minnum neccery of detergnt and condioner when washing cloths and bedding to reduce the lightly hood of a reaction. also get your pillows and dovay washed as this will reduce the levals of alagins in these. it may sound strage but hovering the mattris can also help.
alos a thick mosterise like a body butter on areas which tend to get ichy may help as it will be a barur on the skin, but less greacy than other thick mostrises.