Inadequate Lubrication 

You may be hurting during sex because of a lubrication issue. Lack of adequate natural lubrication and vaginal dryness can be very painful during intercourse.  There are a number of possible causes of inadequate lubrication, including hormonal imbalances (childbirth and menopause) and certain health conditions. 

Also, there are a number of commonly used medications that may reduce lubrication, according to the Mayo Clinic, including: 

• antidepressants;
• high blood pressure medications;
• sedatives;
• antihistamines; and
• certain birth control pills. 

In most cases, a simple, over-the-counter water-based lubricant does the job.