First of all, when mixing sea salt with water, you will almost never achieve the correct concentration; too much salt will dry out the tissue and result in complications with healing. Not enough salt, and it will not clean your piercing effectively.
Considering this, do sea salt soaks help infected piercings?
Apply a warm compress or do a sea salt soak
A warm compress can help the infection drain and relieve pain and swelling. Soaking the infection in a warm salt solution can also help the infection heal.