Can I put a glycerin candle on my daughter's little girl? The instruct…

Can I put a glycerin candle on my daughter's little girl? The instructions say from 3 years old. Duphalac doesn't help, we've been in the hospital for two weeks doing enema, massage and blackberries also don't help. We have an appointment with a gastroenterologist next Friday. Constipation for 5 days. Diet also doesn't affect it, I give her enough water, nothing helps. We still take probiotics.