My son is 11 y/o and started masturbating very often. can he masturbate at this age?

Yes: He can and he is. If its very often, like 10 times a day and persistent he may be dealing with excessive anxiety. Otherwise, i guess i would try to ignore it and make sure you do what u can to block the porn on the computers.

Yes but unusual: If your child is not in puberty, this is particularly unusual. Discuss with your provider to evaulate for possible external influences that would teach this behavior and ensure that your child is not left unattended. If pubertal, it is a bit young. See your physician to discuss precocious puberty.

Certainly: Some boys discover the pleasant sensation of rubbing the penis at a very early age, this can be called masturbation. Many boys go through puberty by or at age-11-years although most of them become pubertal at- age 12-14 yrs. Masturbation after puberty is normal & not unhealthy. He should be advised to do it in the privacy of his own room or bathroom, oherwise it is antisocial.