Whilst you work on your parents you could try melting o couple of dessert spoons of salt in boiling water in a bowl,then top up with cold water til it’s warm bath temperature.Then support Bagels chest and stand her in the water with her butt immersed in the water.If those lumps are abscesses it will help to draw them out and burst them.Another sign of an abscess is a dark bruised looking spot appearing on the skin when they are getting closer to bursting.
It must be tough for you relying on your parents when you obviously care for your rats so much.
I know I'm late but if it is constipation, I'd recommend maybe a supplement drink? I use boost for my babies because that's what I have on hand, and it definitely makes their stool softer so that extra fiber might help. (I've heard that pedialyte is probably the best supplement for them, but I'm not sure if the laxative effect is the same)