you will not spread poison oak to anyone. the skin lesions are not contagious (assuming they are not secondarily infected). the hot tub will not spread poison oak either but it is possible to contaminate a poorly-sanitized and improperly-brominated hot tub with bacteria. direct contact with your boyfriend could spread a secondary infection but you cannot catch poison oak from someone else. this is a common misconception.
can i use my hot tub with a poison ivy/oak/sumac rash? (already washed affected area to remove oil residue). currently on day 3 after contracting rash. localized to just my feet & ankles. have already bathed rash to remove oil residue and using hydrocortisone. i have a hot tub and want to use it but am worried about causing a secondary skin reaction or spreading it to my boyfriend in the water.