A viral Facebook post is offering nursing moms a useful breast pump hack.

On May 31, Switzerland-based lactation consultant Johanna Sargeant posted a tip on her Facebook page, Milk and Motherhood.

Are you someone who sits and watches the trickle of milk, if any, that comes when pumping? Do you get stressed or sad about your output? she asked her post.

Sargeant, who has a 7-year-old and 4-year-old, recalled sitting and watching her pumping progress as she tried to increase her supply.

Id double pump for twenty minutes after ever feed, and become more and more demoralised at the lack of milk in that bottle, she wrote. I realised that, for my own mental health, I needed to stop watching! Easier said than done. Enter the baby sock.

The lactation consultant advised moms to put baby socks over their bottles to prevent themselves from monitoring the progress and lower the stress and pressure around output.

Sargeant, who is originally from Australia, has been working in breastfeeding consulting for four years as a peer supporter, then certified breastfeeding counselor and finally as an International Board Certified Lactation Consultant.

Her Facebook post received more than 10,000 likes. Sargeant told HuffPost the baby sock idea first came to her while attempting to boost her low milk supply with her first baby.

All advice I had received to help make pumping sessions more productive involved relaxation exercises, visualization and affirmations, but I found that the temptation to constantly watch the bottle was too strong and kept pushing me back into my stressed-out and anxious state, she said.

One morning while pumping after feeding, I simply grabbed the sock that was on the couch next to me because dont all new mums have piles of laundry around them constantly? and realized what a relief it was to be able to remove my mind from my lack of milk output, she added.

Sargeant decided to post this tip on her Facebook page after brainstorming with fellow lactation consultants online for a group support session on pumping. Other people in the brainstorm were intrigued by the baby sock hack, so she decided to share it with her audience.