Can someone who has OCD and body dysmorphic disorder please tell me how they saught help?

I do believe my son has both. He has had problems with eating food for years. He has got to the point where he has to buy the food himself and it most is canned. He thinks someone will contaminate his food, try to inject, or somehow mess with the food. He has stopped eating at all family gatherings. He hoards the food in his room and carries it in a bag if he leaves the house. He cooks everything in tin foil too.

He believes a scar on his face is destroying his life. He hates going out unless his scar is covered. He uses hoods, even in summer.

His life is spiraling out of control and he's too young to have to endure such torture, 19.

I feel empathy for him, but I also want so much more for him in life!
His older brother has schizophrenia and would be recluse if not for a program he attends daily.

Help me understand please. Thank you.