What does this mean!?

This is an evaporation line! It’s when the dye dries and created a line. Never check a test after the 5-10min window because you’ll see these lines!

I thought it was something like that! Thank you

I’ve had this with these, mine was negative then 20 mins later an obvious blue line came up. I’ll never use these again

Try the Boots own brand 6 days early tests, i used these and everyone said it was an evap line but i was actually pregnant Best of luck! 💚