Having come from the academic world, I tend to follow the literature. Here’s some studies to inspire you about reflexology.
Anxiety / Depression
Clients’ perceptions of the benefits of reflexology on their quality of life
Constipation
A pilot study of the effectiveness of reflexology in treating idiopathic constipation in women
Frozen Shoulder
Headache / Migraine
Pain
Effects of Reflexology on Pain in Patients With Fibromyalgia
Reflexology in the management of low back pain: A pilot randomised controlled trial
Vagus Nerve
Hack Your Vagus Nerve to Feel Better: 14 Easy Ways