Hi, Joebloom!

Have you ever had any kind of injury to your back or SI joint area at any point in your life? Any falls, car accidents, herniated discs, sports injuries, or other trauma at all?

If it's a hip flexor, then have some anti-inflammatory medications prescribed by your doc. Another way to relieve hip pain is by holding ice to the area for about 15 minutes a few times a day. Try to rest the affected joint as much as possible until you feel better, change your bedding if needed (7 Best Mattresses for Hip Pain Reviewed in Detail (Jun. 2019)). A pillow between the knees while side sleeping may also help to reduce knee and hip pressure and pain as it relieves "sideways pressure" on these joints. Gentle exercising the hip joint with low-impact exercises, stretching, and resistance training can also reduce pain and improve joint mobility. For example, swimming is a good non-impact exercise.
Call your family doctor if your pain doesn't go away, or if you notice swelling, redness, or warmth around the joint. Also call if you have hip pain at night or when you are resting.