[andy east sussex]

I got asked to go remove a pink stain from carpet which took a while to work on I fully remved it and when left property it had gone but had a call to say it had came back through first time ive had this any ideas on what to do next

[John Kelly]

Could be anything but as you said you removed it but it returned then it is probably something which has wicked up from the base of the carpet/backing  as it dried. Remove it again but dry the carpet with an airmover or hairdryer to prevent further wick back.

[stuart_clark]

Try běcarbinate soda ! Sounds daft but derek bolton discovered ph imbalances a few years ago that caused pink flare ups and bicarb totally eradicted it

[clive ware]

Blood?