Are the inside of tampons flushable?

No, no part of a tampon is flushable.

Tampons are typically made from cotton or rayon which doesn't break-down in water like toilet paper or human waste, instead these expand in water up to 10 times their original size so can cause blockages in toilets or further-up the system. In your property flushing tampons could cost a big Plumbing bill, but even if the tampon passes through your plumbing without incident further-up the sewage system sewage it could be a different story - workers have to manually unblock items like tampons to clear blockages, if not caught in time these blockages can lead to pipes bursting flooding the area with raw sewage - every year people flushing items down the toilet that they shouldn't costs water authorities billions.

Tampons can also bypass the sewage treatment plants, making their way into water systems - clogging-up rivers or washing-up on beaches, as well as an eyesore they pose a threat to wildlife as it can take many years for tampons to decompose.

Tampon companies often claim their products are flushable to make them seem more convenient - tampon companies are self-regulated so make up their own rules with no one to stop them, as long as a tampon passes a Brunelle Flushability Test (tampon passes u-bend in a toilet set-up in a laboratory) it can be called 'flushable'. All tampons should be wrapped-up in toilet paper and placed in bins or sanitary disposal units in the bathroom.