Hey there is no corelation between ice pack or hot pack with bleeding in postpartum phase . So you can apply any temporarily as ur preference and irregular bleeding can be due to contractions of uterus during involution . For bleeding control and better involution do continue for breast feeding the baby every 2nd hourly .
Next Steps
continue breastfeeding once 2-3 hours and don't worry [ if its heavy bleeding of soakage of 2-3 pads in an hour ; immediately go to hospital asap ]
Health Tips
consult for further queries!