There are many research papers that have been published about Reflexology. To help you find the one that will help you most, they are listed here in alphabetical order by condition that was being researched:

Anxiety

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4228540/

http://www.ncbi.nlm.nih.gov/pubmed/16487421

Arthritis

http://www.lifesciencesite.com/lsj/life0802/49_5179life0802_357_365.pdf

Back Pain

https://www.ncbi.nlm.nih.gov/pubmed/18346622

Bell’s Palsy

https://www.ncbi.nlm.nih.gov/pubmed/19222052

Blood Flow (Circulation)

http://content.karger.com/Article/Abstract/21238

https://www.researchgate.net/profile/Chua_Poo/publication/222514833_Effect_of_reflexological_stimulation_on_heart_rate_variability/links/00b7d51f9b50ca283b000000.pdf

Cancer Palliation

https://www.ncbi.nlm.nih.gov/pubmed/18772659

https://www.ncbi.nlm.nih.gov/pubmed/12849608

https://www.ncbi.nlm.nih.gov/pubmed/11973949

Chronic Obstructive Pulmonary Disease (COPD)

https://www.ncbi.nlm.nih.gov/pubmed/16648092

Constipation

http://researchrepository.napier.ac.uk/6570/

https://www.ncbi.nlm.nih.gov/pubmed/12715585

Dementia

https://www.ncbi.nlm.nih.gov/pubmed/18370580

Fibromyalgia

https://www.ncbi.nlm.nih.gov/pubmed/20621279

Insomnia

https://journals.sagepub.com/doi/abs/10.1136/aim.2009.000760

Labour (Giving Birth

https://www.ircmj.com/article_204220.html

Menopause

https://www.aor.org.uk/members-news/latest-research

Multiple Sclerosis

http://msj.sagepub.com/content/15/11/1329 

https://www.ncbi.nlm.nih.gov/pubmed/18640629

https://www.ncbi.nlm.nih.gov/pubmed/12926840

Pain

http://reflexmaster.co.uk/wp-content/uploads/2013/08/Exploratory-study-on-the-efficacy-of-reflexology-for-pain-threshold-and-tolerance.pdf

Phantom Pain

http://www.pubfacts.com/detail/18396256/Reflexology-treatment-for-patients-with-lower-limb-amputations-and-phantom-limb-pain–an-exploratory

Premenstrual Syndrome (PMS)

https://pubmed.ncbi.nlm.nih.gov/8233263

Stress

http://www.ncbi.nlm.nih.gov/pubmed/19901496