Hi I had few patents who C/o insects crawling under the skin in some or other parts of body with no other C/O or finding .All were diagnosed as monosymtomatic somatic delusional disorders a rare psyciartic condition and treared with small dosages of anti psychoic drug . They either completely recovered or showed good improvement Your crawling sensation is the bone slightly different in the area However if you are not a case of diabetes hypertension drug users it will not be a bad idea to consult a psychistrist for evaluation Dr Lal Psychiatrist