Spot on bottom front left rib, hurts to touch and and cough?

Most likely trauma: The most suggestive description is that it hurts to touch it. And that it hurts to cough suggests pleurisy or inflammation of the lung lining. This can be anything from a significant contusion to the rib or even a small, non-displaced fracture. If it is slowly getting better, you can watch it. If pain is increasing or difficulty breathing, needs evaluation, your Doc or Urgent Care:)