I have just started to introduce solids to my 4...

I have just started to introduce solids to my 4 1/2 month old DS and I have tried giving him some farex which seemed to have given him dihrioah (not to sure how to spell that word) did anyone else's baby experience the same problem. I have also given him some pumpkin today and he didn't have dihrioah. Only with the farex.