I actually think that anxiety and stress are one of the main underlying causes of candida (as you said Kcirla that stress can be a cause of candida) but not the way that this doctor is saying it. It sounds like he is saying that it is just something psychological which is probably not the case at all. Anxiety and stress build up in the body over time and while they may have psychological causes at first, many times it can be purely physical stress, in either case, it will become physical stress over time. This will repress the immune system and allow candida and other bacterial infections to invade the body. Yes all of the many other causes we know about play a role, Antibiotics , diet, etc. but stress is really the key. This is a cyclical problem because as candida and other infections come in this increases stress in the body even more. The only way to completely cure candida is to remove all stress from the body and allow the immune system to do its job, low-carb diets and anti-fungals generally only work if it is a very mild case of candida.