Hi and welcome,
I do not use dovobet any more - I have had bad rebounds and seen skin damage on thinner skin areas in 3 weeks of use. Not for me.
Dovonex is the same but without the steroid - some people are concerned about the amount of calcium absorbtion so like all medications and treatments you are given or decide on - make it your decission and read up and weigh up the risks.
I was wondring what p your gp has diagnosed as gp's are often not so good with skin conditions as there are so many. I have guttate P which responds well to the sun but it is not an exact science (and there are risks).
Crete being closer to the equator -time of year - your skin type etc etc
The sun exposure does cause damage to the skin (a little pinkness helps my p very quickly) but under the skin, when the p is flaring, the body is still attacking the skin so that could be why you are seeing it come up again. Also if I sunburn badly, I find the p can attack in these damaged regions if the p is flaring.
We are all different as many have said here and also, the p can cycle and the effects change so I hope it calms down for you.