Study aim: Determining the effect of written expression on sexual self-concept of men with multiple sclerosis Design: Randomized control clinical trial which will done on 70 men with MS. Participants assigned to two study groups by random number table which extracted from www.randomization.com site. Settings and conduct: The intervention will be performed in a specialized clinic for neurological diseases and multiple sclerosis located in Tehran for 4 weeks and they will express their emotions and express their feelings in writing. Participants/Inclusion and exclusion criteria: 1. Having at least one sex in the last month 2. EDSS number lower than 5.5 approved by neurologist 3. Literate men 4. Access to virtual networks such as WhatsApp 5. Monogamy 6. At least one year from marital date Intervention groups: The intervention is designed for 4 weeks virtually through WhatsApp along with weekly follow-up. Participants will express their emotions and feelings by writing at least once a week for 15 to 30 minutes. The control group will receive only routine care. Main outcome variables: Sexual self-concept