Haircutting, Styling, and Hair and Scalp Treatments
The three variables of every haircut
Almost every haircut question collapses into three controls: the reference point (where the hair is anchored - apex, parietal ridge, four corners, occipital bone, crown, nape), the elevation/projection (how far the hair is lifted from the head), and distribution (where the hair falls relative to its natural drop). Memorize the elevation map cold: 0° = solid form, 45° = graduated, 90° = uniform layer, 180° = long-layer/increased layering. Overdirection is simply distribution beyond 90° toward the opposite side, used to shift weight from one zone to another.
Cutting versus texturizing
Separate removing length from removing bulk. Point cutting, notching, slicing/slide cutting, and razor rotation texturize ends and interior - they are not shaping tools, and using them as such is the classic distractor. Clipper-over-comb and shear-over-comb create tight blends at the nape and around the ears. Remember guard numbers run counterintuitively: the larger the number, the longer the hair left behind.
Styling and treatment foundations
Styling rests on the foundation chosen - wet set, thermal, or blow-dry - and on hair analysis: texture (diameter), density (hairs per square inch), porosity (absorbency), and elasticity (stretch-and-return). Low elasticity signals fragile hair: lower heat, gentler chemistry, no aggressive tension. Scalp findings such as ringworm, lice, weeping lesions, or carbuncles are referral issues, never treatment issues - a barber may shampoo and massage healthy scalp tissue but may not diagnose or attempt to cure.
Worked example
A client wants a bob that is "stacked and blended at the nape but long on top." Stacking is graduation, so hold the nape sections at 45° and work upward, then switch to 0° at the perimeter to keep the outline solid. If instead the client says "lots of layers all over but keep my length," you are at 180°, not 90° - 90° would shorten the outer shape.