I get erection whenever I sleep so hen I wake up my penis is erected,
How to solve

Waking up with an erection is a perfectly normal part of being male! Please don't worry about it and I can tell you from experience, that it does wear off a bit as you get older, so make the most of it while you can! There really is nothing to worry about.

It is common for most sexually able males to wake up in the morning with a substantial erection. By erection we aren't talking about some builders scaffolding or a model of the Eiffel Tower - it is in reference to the erect male member. It goes by many other names - 'woody', 'stiffy', 'hard-on', and there have been many scientific (and some not-so-scientific) theories put forward to explain why men suffer from a 'morning glory' (also the name of a common flowering plant), but to this date none have been proven. Rest assured though, the occurrence is perfectly natural and nothing to be worried about - unless of course the penis is finding itself erect at the most inopportune moments.

I agree with you Robt it is a common thing among the youngsters that they find erection in penis when they wake up in the morning, it is also called as the boner, it is due to some thoughts which are running in your mind when you were sleeping. It is absolutely normal and an indication of a good sex power.

I read recently that this is a sign of good health and of course in young men who are always on the edge this is just another thing that signals that they have reached or are almost ready to reach sexually maturity. This should fade after the first pee of the day but if you have a partner, it might be worth exploring another use for it!! I know that it can be embarrassing if you are sleeping in a room with other men in a dormitory for instance but then you are all in the same boat so don't worry about it!

To some extent i favour the words of Clenbut, but what ever you done in a whole day, so at night it walk around in mind while sleeping, but we taking about sex, in a day while sex if any problem happen related to sexual health, it makes feel shy once to remember that movement....!