Diabetes patients have increased risk of complications, or additional dangerous medical conditions that develop as a result from diabetes. Watch out for these common symptoms: 1. Leg cramps, lowered sensitivity of the foot, and changes in skin color of the leg: may be a sign of atherosclerosis, or hardening of the blood vessels. This is dangerous and may predict heart attacks or strokes. 2. Vision problems, vision loss, or eye pain: diabetic eye disease is also a common ailment, since the many nerves in the eye may be affected by the high sugar content in the blood. One user described it as "a speck of dust in my eye which would not budge", can also include dark spots of vision, blurred vision, or difficulty perceiving color. 3. Swelling of hands and feet: a sign of advanced kidney failure. 4. Tingling, numbness, burning, or shooting or stabbing pain in the feet, hands, or other parts of your body: peripheral diabetic neuropathy, which means damage to the nerves in your arms and legs. 5. Difficulty sensing when your bladder is full, sexual problems, dizziness, fainting, or difficulty sensing when your blood sugar is low: autonomic neuropathy, or damage to the nerves in your internal organs.