Reinsertion of the stylet may decrease the rate of post lumbar puncture headaches. "Cimex" pierces the skin of its host with a stylet fascicle, rostrum, or "beak". The infected phloem is taken up through the aphid stylet into the digestive system. The male has significantly reduced esophagus and stylet. The stylet is capable of piercing tissues and sucking liquids, while the labium supports it. In this order only the left mandible is present, modified into a stylet. During piercing, the labium remains outside the food item's skin, folding away from the stylet. They release chemicals from the stylet to destroy the membranes of nearby cells. The mouth often includes a sharp stylet, which the animal can thrust into its prey. They have a stylet located above the heart, that is short and made of chitin. It often, although not always, possesses a sharp stylet. The J2 male has a stylet while the J3 and J4 have a weaker stylet.