Not Medical Advice: It may cause a pulled groin, a strain in the muscles known as the adductor group, which connects the pelvis to the femur.
The injury occurs when you overstretch a muscle and can result in small tears in the tissue.
To treat it, try the good, old-fashioned combination of rest and ice. Initially, you should ice the muscle for about 20 minutes at a time. After 48 hours, you can transition to heating pads or similar warming treatments. Anti-inflammatory medications can also help with any pain or swelling.
Here's how to Safely Learn the Splits shared by Athletico.com.