Separation Anxiety

My sons first year of life has been amazing. But now since he has turned 1 he has been crying everyday at daycare. He always wants to be held 24/7 there. When he comes home he is totally fine & doesn’t act out at home or with anyone in my family. Just daycare. The owner of the daycare is a friend of mine. He has 4 top teeth that broke in but I give him teething tablets & Ect. But he doesn’t holler or whine at all at home so I don’t think it’s his teeth that are bothering him. Is it stranger or separation anxiety. I’m so confused…..