[header] How to ease the morning stiffness of psoriatic arthritis [title] Apply heat to your joints in the morning. [step] Apply heat to your stiff joints in the morning, which will increase circulation. You can use a warm paraffin wax treatment, which is available from drugstores. 
If you do not have one, you could put a wet cloth in a freezer bag and heat it up in the microwave for 30 seconds to one minute. Then, put the warm cloth in a towel, so it doesn't scald your skin, and apply it to the sore joint.