They appear in the morning, after a long stay in one position or sleep on a high pillow, in the evening - after a busy day, long work at the computer.
Babonakala ekuseni, ngemuva kokuhlala isikhathi eside endaweni eyodwa, noma ubuthongo ku umcamelo okusezingeni eliphezulu, kusihlwa - ngemuva kosuku umatasa, umsebenzi eside ngesikhathi ikhompyutha.