It's psoas syndrome, this muscle act as flexion in your hip joint and extension at lower spine. When u do squat it's painfull becoz ur psoas muscle got injured.
Due to improper warm up, improper posture (which we call tricky movement) and dehydrated body.
Next Steps
X Ray lower spine Ap and Lateral view.
Use Lumbar support when u r performing ur ADL.
Apply Rogan Phosphorus on ur lower back and anterior to the upper thigh, which help to relax ur muscle tightness.
For complete healing, you have to go for Physiotherapy Doctor.
Health Tips
Do's
Bridging and back press ex gently . 5 times rep 3 times in a day
Drink 3 times coconut water in a day for a week.
If u don't have any acidity problem then u can take sprouts for
calcium.
Don't
Avoid such activities which may create ur backpain.
Avoid full stomach meal to avoid acidity becoz in some cases acidity increase ur back pain.
For further help contact me