Hi,
Welcome to health care magic,
Lump between anal and vaginal region could be lipoma or skin tag or cyst etc but it must be examined before coming to any conclusion.
So,you need to consult surgeon or
dermatologist for proper clinical examination.
Secondly,itching over anal region could be due to intestinal parasites or diarrhea or
candidiasis or anal fissures etc.
You must be diagnosed before taking any specific treatment.It is very could be because of
bowel cancer so no need to worry about it.
For that,you must be checked by surgeon for complete history and thoroughly clinical examination.
You may require routine blood count, stool examination for R/M ova and cyst and proctoscopy etc.
Treatment is mainly depend on the underlying cause but you may require full course of antibiotics (quinolones-ofloxacin with antiprotozoals like
metronidazole or
ornidazole) for minimum 7 to 10 days with antihelminthic, antihistamines and topical steroids and lignocaine in combination for symptomatic relief.
Thanks and Regards,