"Severe anxiety" refers to a strong feeling of unease, worry, or fear that greatly affects a person's daily life, making it difficult for them to handle normal situations.
I had also struggled with severe anxiety for 10 years. (justinhealth.com)
She has multiple severe anxiety disorders, but let's nothing stop her from sharing her passion of healthy teen living. (mindbodygreen.com)
If one suffers from severe anxiety, cognitive behavior therapy can be helpful in changing one's thought patterns and how he or she reacts to anxiety - provoking stimuli. (businessinsider.com)