Can teething cause excessive sleepiness?
He could be sleepy because of teething, but he could also be going through a growth spurt. Any time a child goes through a developmental growth spurt, their sleep schedules change… either more or less. I wouldn’t worry about it just yet. Let things run their course, let the teeth come in and just wait and see. If he is still sleeping that much, maybe you could take him in, but I would bet that within a few weeks, he’ll be back to normal. You didn’t say how old he was…. that might be helpful to know.