Suggest Remedy Itchy Rashes On Body

I NEED TO KNOW WHAT THIS ITCHY RASH IS ON MY BODY, IM THINKING SCABIES BECAUSE IT TENDS TO GET WORSE AT NIGHT AND SORT OF LOOKS LIKE THE LITTLE PICTURES OF SCABIES IVE SEEN ON WEBSITES, I HAVE SCWIGGLEY LINES ON MY HANDS AND A COUPLE ON MY FEET MY BACK ITCHES MY HANDS ITCH AND THE BACK OF MY LEGS BELOW MY BUTTOCKS ALSO BETWEEN MY LEGS ON MY THIGHS ITCHS VERY BAD...PLEASE CAN U GIVE ME SOME ADVICE