How long do I need to wait after a laser threatment till I can get exposed to solar radiation
And,
1:
Is there any diffrences in time among laser-types?
I know that Nd:YAG laser allows you to immediatley be exposed to sun.
But what about Diode and Alexandrite?
2:
Is sunblock effective to reduce risks or even minimizes the risks completely for getting pigments alternations?
Until your skin heals - all the scabs go away. That should be minimum 1 week, but more is better of course (if Diode or Alexandride is used with effective settings on skintype 2). And of course sunbathing should be awoided for longer…It all depends of your skin reaction after laser.
I didnt tryed Nd:YAG - but allso this laser light is absorbed by your skin and you shouldn immediately expose it to strong summer sunlight…
And sunblock is allways good, if you do areas exposed to sunlight, its good to use sunblock on them until it all heals.
You shouldn’t be tanning AT ALL during your treatments no matter what the laser is. It’s in your best interests to keep the skin as light as possible. So we don’t recommend tanning at all.
Yes, What I’m more talking about here is being able to take off the shirt and take a swim while you chillin on the beach.
I wouldn’t of course tanning.
Just wonder how senestive the skin is, since I’m planning my laser threatments in a week and still want to be able to go to the beach, of course with tshirt on but occasionally take a swim without it 
No matter the laser, you technically shouldn’t have any sun exposure on areas you’re treating from a few months before your first treatment to a few months after your final treatment. That means you’ll be without sun in those areas for over a year.
So i wont even be able to take a swim despite sun block months after my threatments?
You can, as long as you take whatever steps you can to minimise tanning as much as possible. However, the recommendation is to avoid tanning whatsoever so that decent settings can be continued to be used. If you tan, they will have to reduce the settings, which will affect your hair removal results.
If you want to tan in the summer, you need to abort treatments and continue after at least 2-3 months after your last sunbath (need to be as pale as possible not to get burned and that the highest possible energy can be used).
But of course, better is not to sunbath at all - it is just up to you if it is worth to you miss the whole summer sitting somewhere inside or hiding all areas treated…
Doing electrologic treatments you can go out and tan after scabs are healed.
You can swim. Just make sure you use a good sunblock and keep the area as pale as possible.
As mentioned, you may want to start your treatments after summer is over. The first few treatments are important and you should make sure you’re pale enough to be able to take high settings without adverse effects.
Why can’t you tan for few months after your final treatment?
If you don’t need any touchups you should be fine when shedding completes. You should wait for that, at a minimum, to avoid inducing hyperpigmentation.
In any case, tanning is a bad idea even if you aren’t doing LHR. Tanning:skin::cigarettes:lungs
The number one problem with sun exposure is that if you expose yourself, your skin will become vulnerable and then what usually would be “normal” settings for your skin type, could now seriously burn you. If people come to me after they were on some summer vacation, i would tell them to wait 2 weeks just to be safe. I’ve once had a case where someone “forgot” to mention that she was on vacation and even though you couldn’t see any tan on her, she was burned because of that. Better safe than sorry.
The other problem is that if you tan, they will most likely have to lower the settings to accommodate your new skin type.