Medicinal Wank 

Masturbation as a medicinal tonic rather than for pure pleasure, with the purpose of relieving a condition such as stress or insomnia or for the promotion of general well being.

"I'll have a quick medicinal wank and be off to sleep in no time"
"I was getting quite stressed, but a medicinal wank calmed me down"
"A wank a day keeps the doctor away"

Medicinal Wank by Dr Cockshuffle MD October 12, 2012

Medical Wank 

The act of masturbating to relieve lovers nuts AKA blue balls

I had to have a medical wank after some heavy petting on the second date with Sharon

Medical Wank by Medical Wanker August 21, 2019