Hello and welcome to Healthcare Magic. Thanks for your query.Depression
is a form of mental illness. It can present with various psychological as well as somatic or bodily symptoms. In addition, from the description of your mother's symptoms such as phobia
of germs, obsession with cleanliness, etc. it appears that she may also be having an obsessive-compulsive disorder
Both depression and OCD are treatable conditions and usually there is a good response to anti-depressant medication. There are also effective psychological therapies and counselling
techniques which can help her overcome these problems. So, please take her to a psychiatrist
for a detailed evaluation and further treatment.
Wish you all the best.
Dr. Jonas Sundarakumar