I would say stay with Rhus-t. yo can repeat 2to 3times a day.

Rhus toxicodendron: This remedy is useful in cases of chicken pox with tremendous itching that is worse from scratching and relieved by warm baths or applying heat. The child may be very restless, both physically and mentally. The eyes may become inflamed and sticky. Muscles can ache and feel very stiff, also relieved by warmth and gentle motion. Rhus-t-helps prevent infection.