what's wrong with my EUPHORBIA ACRURENSIS?

[PukkaLovetea]

I've had it 7 months, it's been great. Sits in a very light window. Which, I had assumed, would be even lighter and warmer given the summer (though obviously central heating is off and it's also near a radiator).

But suddenly it's got lighter streaks in what was dark?

See pics. Any thoughts?

Do you mean the paler, mottled cross-banding? That's its natural colouring, most succulent Euphorbias exhibit a certain amount of paler variegated striation, so nothing to worry about!

Hi, yes the mottled light strokes on it suddenly. Great, glad it's normal. It just suddenly appeared - lighter tips at the top of the cactus and on the main body.