Bryonia patients are also easily irritated; they don’t want to be bothered.
But the great sign for this remedy is immobility. The sick child may lie for hours without moving, and even then object to it or show signs of pain. If you raise his head he looks faint. Bryonia is cross, constipated, too hot and very quiet. Just the reverse of Rhus toxicodendron all around, although the sensations may be very much alike.
Reference: C. M. Boger