Atgoffwyd rhieni o’r arwyddion i fod yn ymwybodol ohonynt mewn plant a phobl ifanc. Gall y rhain ddatblygu’n gyflym iawn dros ychydig ddiwrnodau neu wythnosau.
Parents were reminded of the signs to watch out for in children and young people which can develop very quickly over a few days or weeks.