When you have an image which needs some spot fixing before printing you can often do the work in Lightroom and avoid the necessity of a round trip to Photoshop. Lightroom has both a Clone and a Heal tool available for fixing blemishes and removing problems such as spots caused by dust on your camera’s sensor.
To see how to use these tools in Lightroom, start by selecting an image to fix and select the Lightroom Develop module.
Locate the Spot Removal tool which is situated below the Histogram and to the immediate right of the Crop tool. You can also select it by pressing its shortcut key N.