Bacterial infections:

The most common bacterial infection of the skin is impetigo. Impetigo is caused by staph or strep germs and is much more common in children than adults. Again, poor hygiene plays little or no role. Nonprescription antibacterial creams like bacitracin or Neosporin are not very effective. Oral antibiotics or prescription-strength creams like Bactroban are usually needed.