The aim is to study the effect of local anaesthesia (EMLA®) on pain associated with sterile water injections.

Sterile Water Injection (SWI) was previously shown to give good pain relief for lower-back pain during childbirth, chronic neck pain and ureterolithiasis. However, the pain associated with the injections remains problematic, and therefore it is important to find a less painful injection technique.

Inclusion Criteria

• Woman
• Age 18-45 years
• Healthy
• Ability to understand information and instructions

Exclusion Criteria:

• Pregnancy
• Previous experience of SWI
• On-going pain
• Use of medication for depression, pain, or sleeping disorder 24 hours prior to the experiment
• Smoking, snuffing, physical activity, and intake of caffeinated beverages (coffee, tea, or energy drink (e.g., Red Bull) 2 hours prior to the experiment