Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain it seems that itching in anus which exaggerate with sweating and also when you do not have hemorrhoid or constipation can be due to causes like Poor hygiene maintenance, over wiping or cleaning, dryness in the anal area, yeast infection,contact dermatitis or allergic reaction,etc.. As it is just 5 days it needs not to be something serious.. As of now you should keep the area clean but avoid vigorous wiping.. Wash the area gently with water and a mild moisturiser based soap.. You should apply Zinc oxide based ointment or Petroleum jelly over the area.. Wear loose fitting and cotton undergarments.. You can also apply steroid ointment to relieve itching but do not use for a long duration for more than ten days to two weeks.. You should avoid scratching the area to prevent infection.. If still it does not improve consult a Proctologist and get evaluated and a proper diagnosis and treatment of underlying cause can relieve the symptoms.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.