Several infectious skin diseases also cause a rash. These can be caused by a number of infections with bacteria or viruses, and infestations of mites within the skin. Some infectious skin diseases, such as scabies, are caused by mites that bore into the skin surface causing irritation and a localised rash.
Now, as for your question about when to start taking oral contraceptives, there's really no hard-and-fast rule about when to start taking birth control pills. Starting in the first few days of your cycle is the surest way to prevent inadvertently taking pills while you are pregnant.
Normally you would take your birth control pills for a certain number of days and then you would take placebo pills until you start back on the actual pill. While taking the placebo pills, you have your period. Take the birth control pills as prescribed during the monthly cycle.Open your second month's supply of pills.ormally you would take your birth control pills for a certain number of days and then you would take placebo pills until you start back on the actual pill. While taking the placebo pills, you have your period. Take the birth control pills as prescribed during the monthly cycle.