can anyone tell me what it is?

Since the day i went to nasional service, i got some kind of "diseases" i guess....not really serious diseases but it is quite scary....why it is so scary?first of all, it is because i don't know what is the cause of that "disease"....it just happen whenever it likes...the symptoms of the disease is something like mosquito's bites but the size of the "pop-up skin" is thousands times larger than mosquito's bite....at first, the pop-up skin is just very small...about 1cm squared, after 5 minutes, 3cm squared....7cm squared...15cm squared...30cm squared.......OMG!WHAT IS THAT?can anyone tell me?

There's a picture down there...you can check on it!

this "pop-up skin" will go away after one hour...usually one hour...but sometimes it takes hours...it really troublesome me....it is very itchy...if it on my body, then worst...i can't sleep....help me!anyone know the answer i will greet them as doctor....faster! who wants to be the doctor????but please don't just simply give me an aswer......

oh ya!now i am back from ns already...at first i thought that this disease will go away itself...but it never...after shifting to perak, everything still the same!i dunoe what it is?i have seen the doctor before...but the doctor just say that i got some kind of allergic...but i don't think so!help me!