Similar to chickenpox, an oatmeal or cornstarch bath can help relieve itching. Take note to use cool or lukewarm bathwater only. Additionally, you may consider applying a cool, moist compress to any blisters. Over the counter lotions and ointments containing capsaicin can also help. Lastly, good old-fashioned calamine lotion may also help. Good luck with your symptoms - I hope you find relief!