If you suffer from severe hayfever/allergy symptoms this could be a great treatment for you. Kenalog is a steroid treatment that reduces the actions of chemicals in the body that cause inflammation. For best effects, this injection should be administered 4-6 weeks before the high-pollen season. Kenalog can relieve hayfever symptoms for 3-4 months which helps many clients to enjoy the Summer months with relief. Kenalog can also be used to help other diseases and disorders and be given in different areas depending on the condition.