Light. Cough please advise?

Over the counter med. For a light cough, one might try over the counter cough med such as Robitussin (guaifenesin)-DM for a dry cough or Robitussin (guaifenesin) CF for a productive cough. If associated with fever, wheezing, shortness of breath, or persists and worsens, then see one's doc .
Sx relief. Hydrate well. Consider using a warm air vaporizer. Mix several teaspoons of honey into herbal tea with a squeeze of lemon juice. Or make tea with 2 tsp of marshmallow root bark per 1cup of hot water (steep in a covered pot for at least 5 minutes). Drink several times a day or as needed to relieve coughing. See a physician if your cough is not resolving, difficulty breathing or temp > 104.