Hair,skin and nails

• Papule


  An elevated, solid lesion that measures less than 0.5cm. Papules are the most common type of primary lesion.
• Nodule

  A raised solid lesion that is greater than 0.5 cm in diameter. A large nodule is called a tumor.
• Plaque


  A superficial, solid, elevated lesion that greater than 0.5 cm in diameter.
• Plaque

  Multiple papules.
• Wheal


  A firm, spongy lesion formed when the dermis is filled with fluid. A wheal will typically last for a very short time - up to hours - then disappear.
• Macule


  A flat discoloration that has a definite border.
• Pustule


  An elevated lesion of any size that contains pus.
• Vesicle


  A raised lesion that is filled with fluid and is less than 0.5 cm in diameter.
• Bulla


  A raised lesion that is greater than 0.5 cm in diameter and contains clear fluid.