Forehead
V1: Ophthalmic branch
Cheek
V2: maxillary branch
Lower jaw (excluding angle of mandible)
V3: mandibular branch
Back of head, above ears
C2
Back of head, below ears
C3
Angle of the mandible
C2/C3
Supraclavicular fossa in the midline
C3
Over acromioclavicular joint
C4
Over deltoid
C5
Lateral arm/forearm
C6/C7
Thumb
C6
Middle finger
C7
Little finger
C8
Medial side of arm
T1
Nipples
T4
Umbilicus
T10
Inguinal ligament
L1
Anterior and medial thigh
L2/L3
Medial anterior calf
L4
Lateral anterior calf and medial side of big toe
L5
Posterior and outer leg
L5/S1/S2
Lateral margin of foot and little toe
S1
Perineum
S2-4
Arsehole
S5