Summarize this article in one sentence.
Vaginal dryness has a number of causes. If your vaginal dryness came on suddenly, you should see your gynecologist to rule out medical causes.  Usually, the cause of vaginal dryness is benign. Menopause, childbirth, and breastfeeding can all alter hormonal levels and cause dryness. However, occasionally vaginal dryness is caused by more serious problems like certain cancers and immune disorders. This is why it's important to see a doctor quickly if you notice any changes as for these types of diseases early intervention is important.  Sjogren's Syndrome is an autoimmune disease in which your body's immune system attacks healthy tissues. In can lead to vaginal dryness, in addition to other symptoms like dry eyes and a dry mouth. Your doctor can perform a blood test to see if you have Sjogren's Syndrome. If you're entering menopause, hormonal replacement therapy (HRT) can ease many symptoms including vaginal dryness.  Not only can hormone replacement therapy improve vaginal dryness, it can help with other symptoms of menopause such as hot flashes. Usually, you would wear a patch or take oral tablets of low doses of estrogen and other hormones that your body produces less of as you enter menopause.  Hormone replace therapy does carry some risks. Oral combined hormone pills that contain estrogen and progesterone have shown to increase the risk of breast cancer,  heart attack, and stroke. Talk to your doctor about these risk factors and how they might apply to you. An estrogen ring is a form of hormone replacement therapy that many women find easier to use than pills. Your gynecologist inserts a small, flexible ring into the upper part of your vagina. The ring will release doses of estrogen on a regular schedule. It will need to be replaced every three months. Oftentimes, vaginal dryness is a side effect of existing medication. Decongestants especially, found in many cold or allergy medications, can lead to vaginal dryness. If you believe your dryness is caused by your medications, talk to your doctor about alternative meds.

Summary:
Make an appointment with your gynecologist. Ask about Hormone Replacement Therapy. Try an estrogen ring. Consider your existing medications.