Left knee pain, thigh pain, hip pain. Pelvis pressure & inflamation, low back pain, constipation, lump above navel, pelvic tilt to left 2 yrs?

Vague . Your symptoms may be serious but are very vague and could be related to any number of things. Best advice is get a physical exam from your md to discuss.
See your doctor . Too many symptoms to even attempt an educated guess. Some of these symptoms may be related and others are likely not. The best advice is to see a physician for a thorough evaluation.

Related Questions

Left knee and thigh pain/tightness. Lower back pain. Lower back and hip pop a lot. Any ideas?

See a doctor. you either abuse your body, and your joints a lot, or you might have some unusual kind of arthritis for your young age. either way see a doctor for proper evaluation and treatment. do not abuse your body the rental place is closed. Read more...
Stretching needed. If there is pain and tightness to outer side (lateral) knee as well as the thigh, this may be a tight iliotibial band (ITB); when it affects function at the knee its called ITB syndrome. Stretching of the lateral thigh and knee, and the use of a foam roller or massage here can help. Tightness of the hamstrings can also cause some lower back pain. If popping is painful get check by your doctor. Read more...
Many causes that can. be narrowed in a physician evaluation which I recommend. 8/10 people will have low back pain & 90% have no identified cause resolve by 6 weeks and treated with rest, ice, heat, NSAIDs and other supportive care. But the most likely culprits in the otherwise healthy: muscle strain. an arthritis, scoliosis, stenosis, degenerative disc, herniated disc, "pinched nerve". There are hip causes as well... Read more...