difficult child 2 is in residential for treatment of substance abuse and anxiety/ODD. Right up until the night before he left, I'm pretty sure he was smoking at least once a day, probably more. The second night at the facility, they had to wake him to receive my phone call, because he had such an horrendous headache that the only relief was sleep. He has complained of having no appetite, not being able to fall asleep, and feeling depressed and despondent. Wondering, how much, if any, of this malaise is due to the sudden shutoff of THC to his brain, or is it just a spoiled, homesick, heartbroken kid who just wants to go home?