Many are very small, while cysts associated with ovarian tumors may be 12 inches or more in diameter. All ovarian cysts, however, fall under one of the following categories: simple cysts or complex cysts. However, they also make their presence known from time to time and cause trouble for other women. PCOS causes many cysts to grow on your ovary. Ovarian cysts can cause breast tenderness, and an aching pain in the thighs and lower back. Pain during intercourse and at other times can also indicate the presence of ovarian cysts. Ovarian cysts form on or inside ovaries, and can be the result of various causes. Polycystic ovary syndrome is a condition that causes many small, simple ovarian cysts. Ovaries — Most ovarian cysts are simple cysts that don't require specific treatment. Ovarian cysts are more common in the childbearing years between puberty and menopause.   Ovarian cysts form in or on a female’s ovaries as fluid-filled sacs. Morgan Swofford for LittleThings. Here's what you need to know, according to ob-gyns, about ovarian cyst causes and types of ovarian cysts. Breast cyst Benign cysts can develop in your breasts when fluid … Taking fertility drugs often causes the development of multiple follicles (cysts) in the ovaries. An ovarian cyst is an enclosed sac-like structure filled with fluid or semi-solid material located in the ovary. Most of the time, they are painless and cancer-free. If the cyst is very large, your doctor can use a needle to remove the fluid from the cyst and/or inject corticosteroid medication into the cyst or knee. Ovarian cysts are very common and can arise due to a number of causes. Large or ruptured ovarian cysts can cause symptoms including pain, pelvic pressure, or discomfort. The exact cause is unknown, but it involves a hormone … Like with uterine fibroids, ovarian cysts can cause a feeling a heaviness in the abdomen. Learn about the symptoms, treatment options, and outlook for ovarian cysts and ovarian cancer. Ovarian Cyst Symptoms . Ovarian cysts often cause no symptoms; however, when symptoms are present, you may notice a sharp or dull ache that may come and go or a sense of bloating or pressure in the lower abdomen. Ovarian cysts can vary in size. Symptom #5: Problems Urinating And Defecating. Vaginal (pelvic) ultrasound can be used to reveal the presence of ovarian cysts. You may be at higher risk for a ruptured ovarian cyst if you have polycystic ovarian syndrome (PCOS). Expanding or ruptured cysts that cause pelvic pain are treated with oral pain relievers. Though most ovarian cysts are benign, some are cancerous. Pregnancy, endometriosis, and your typical menstrual cycle can all be causes of ovarian cysts. Simple cysts are the most common and are a result of the menstrual cycle. The condition is less common after menopause. Any of the following can lead to a ruptured cyst: Hormone changes around the time of your monthly period; Pressure on the cyst from sports, sex, or an injury to the area (usually large cysts) Pregnancy Ovarian cysts are associated with an increased risk of cancer when they occur after menopause.