Methods and devices for treatment of skin are disclosed. These methods and devices use electromagnetic radiation to create networks or patterns of treatment zones. The networks or patterns of treatment zones comprise at least four treatment zones, at least two of the treatment zones in the network or pattern are slanted at angles in the skin, and the treatment zones extend at least as deep as the dermal-epidermal junction of the skin. Producing intersecting treatment zones and/or overlapping treatment patterns can increase the effectiveness of the treatments. The devices comprise a hand piece operably coupled to a delivery element, wherein delivery of electromagnetic radiation through the device to a portion of skin produces a network or pattern of treatment zones. The use of these methods and devices results in tightening of the skin and/or improvement in the cosmetic appearance of wrinkles in the portion of skin treated.