Your physician can tell a lot about your health simply by looking at you. Obvious signs and symptoms include weak (atrophied) or asymmetrical muscles, improper alignment, swelling, changes in skin color (such as bruises or redness that might indicate inflammation) and growths such as cysts, calluses or corns. But the physical examination is much more than just a cursory look. It can also involve gait analysis (how you walk), palpation, muscle testing, flexibility (range of motion) testing, reflex response, and laboratory tests such as a complete blood count and urine analysis.