The most important part of diagnosis is to understand the origin of any illness and treat it while calming down the symptoms.
For example, I get patients who complain of headache and mention casually that it worsens with stress. I get IBS patients whose symptoms get worse with stress. Insomnia that gets worse with stress. In those three examples, they come and want a fix for their head, intestines and sleep, which is great, but will it fix it?
The body needs an outlet for all the Qi (energy) stagnation that was caused by the stress. You block one exit, your body will find another one and you simply develop different symptoms. Gently move and tonify the Qi, the symptoms will slowly go away. Of course, in this example of stress you need to see what causes it.