I was spreading mulch yesterday. i did wear gloves, but had to get under pine trees. i have red bumps all over forearm.no itch but they look blistered?

Sensitivity rash: Sounds like either skin irritation or contact dermatitis (example is poison ivy, but many natural causes can exist). Be sure to wash all clothes, bedsheets, or anything else you may have been in contact with before showering (small amounts of resin can cause persistent activation). If it does not appear infected, then hydrocortisone may help. If not improved in a few days, may need examination.