1 It may cause rashes in hypersensitive people.  Iodine contrast can also cause an allergic reaction. Itâs an X-ray radiocontrast agent used for intravenous injections. Contrast dyes containing iodine have been responsible for severe allergy reactions (including deaths) in a limited number of hypersensitive people.
Do not resume a rigorous workout, because of the risk of further injury to the sore muscles. Massage is another way to reduce soreness. Massaging the muscles and promoting proper muscle relaxation will help keep muscle contractions down to a minimum.
Massage can help tight muscles release and loosen up a stiff and sore lower back. All you need is a a foam roller. Place the foam roller under your lower back and place your feet flat on the floor. Using your feet for leverage, roll up and down on the foam roller over the muscles that are tight and tender.