MOM IN NEED OF HELP!

HEY JUST WAS WONDERING IF ANY ONE CAN HELP ME OUT, KAMERON WHO IS 5 AND HAS AUTISM HAS BEEN BITTING HIS ARMS, HANDS ALOT SO MUCH IT IS BRUISING HIM, HE IS UPSET SOME TIMES THAT HE DOES THIS AND MOST OF THE THINGS WE DO ISNT HELPING HIM ,HE ASLO IS DESTROYING ALL HIS TOYS , HE IS ON MEDICINE ,IT DOES OCCASIONALLY HELP BUT HE JUST SEEMS SO UPSET, ANYONE OUT THERE WITH ANY ADVICE? HE DOES GO TO SCHOOL AND DOES IT AT SCHOOL. HE IS NON VERBAL SO WE DONT KNOW WHATS GOIN ON  ,HE ALSO DOESNT LIKE TO BE AROUND SMALL CHILDREN HE WANTS TO PUSH SHOVE KICK  AND WE HAVE TRIED EVERYTHING  NOTHING SEEMS TO WORK .PLEASE IF ANYONE CAN HELP  IT WOULD BE APPRCIATED