The effects of CS spray can include discomfort to the eyes, a burning sensation, coughing, tightness in the chest and it may also cause your skin to go red and feel hot. Most people recover within 15-30 minutes after a brief exposure.
If you are exposed to CS gas you should remove yourself from any confined space where the gas has been used and into the fresh air. Do not rub your eyes and with clean hands remove contact lenses. To aid recovery irrigate the eyes with plenty of cold water.
If the symptoms persist you should seek medical advice.