Myth: All antibiotics reduce the effectiveness of birth control pills. Fact: Most prescription antibiotics and oral contraceptives come with safety inserts that warn of certain drugs that can compromise the effectiveness of oral contraceptives. Research has revealed that one drug, Rifampin, may interfere with birth control.
There are several types of cysts on head: Dermoid Cyst. Dermoid cysts, known as pilar cysts, are congenital type of cysts that contain hair, fluid, teeth or sweat glands. Dermoid cysts can be located on or in the skin and usually occur on the face, lower back, inside the skull or in the ovaries.
Sebaceous cyst. Pilar cysts (also termed trichelemmal cysts, isthmus-catagen cysts). Both of the above types of cyst contain keratin, not sebum, and neither originates from sebaceous glands. Epidermoid cysts originate in the epidermis and pilar cysts originate from hair follicles. Therefore, technically speaking they are not sebaceous cysts.