9 year old crying and doesn't know why

[DeeSquared]

My 9 yr old son started crying this week, pretty much every evening and doesn't seem to know why.  He just all of the sudden gets weepy and sometimes sobbing, and can't seem to stop.  This happened in the spring during school, and he said he just felt like he was going to cry, so he removed himself from the classroom before he cried in front of the class.  It happened 2 or 3 times, and then stopped.  So, now several months later it is happening again, and has happened every night Sunday through Thursday.  I have talked with him about what is causing it, he says he doesn't know why.  We have asked about people who have hurt him, threatened him, kids bullying, etc and he denies all of that.  He doesn't watch scary movies, doesn't seem to have nightmares, etc.  He is an otherwise healthy young man, has friends, gets along with others, no changes in our family or situation, has interest in activities etc.  He is slightly underweight.  His diet could be better.  He eats a variety of foods, but would prefer to eat sugary foods, soda, snacks etc.  But will eat pretty much anything we put in front of him.
Do you have any suggestions?  Could it be hormones?  Vitamin deficiency? We are worried about him and what could be causing it.  In the mean time, I have made an appointment with our pediatrician.
Thank you for any insight you may have.

[RockRose]

If he honestly, really,  doesn't know why he's crying,  it sounds like some kind of hormone imbalance.  

[DeeSquared]

re:son crying

thanks for your comments.  I know his friends well, I see him play and interact with them, nothing I am concerned about.  They play at our house as often as anywhere else.  He is #4 of 4, and I have 3 boys and 1 girl.  I have become the master of the 100 question game until I get enough information.  He is the most sensitive of the 4.  I continue to question and observe, and can't find any kind of pattern as to who he was playing with, where he was, what they were playing etc.  He does interact with dad, doing stuff together they enjoy.  Tonight, he started to become weepy at dinner time, he was able to stop it, and later told me it was a good night, he hasn't cried.  He knows he has an appt with the pediatrician next Thurs, and said lets wait and see before we cancel the appt.

[Oceana2020]

I have the same issue with 8 year old going on 9 this year.  Please keep me posted I'm very concerned as well.

[Sandman2]

Hi, this is a very old post.  Give us a bit more information and maybe we can help.  

[margypops]

You know children wont always say if they are bullied, in case of more trouble, so I would check out with the teacher ,/school if anything is happening there, you say he has friends have you seen him with them do they come to your house? it is always a good thing to check friends out he spends time with, be more aware .It does sound as if something is really upsetting him, questioning doesnt always work to have to take a look yourself. Does he do things with his Dad, ballgames. outside ,Fun