Back pain at night is a red flag. Though it can be due to a simple reason like too soft a bed, sunken mattress, spending too long in bed due to lockdown, using laptop while lying down, poor sleeping posture, over work,
calcium and
vitamin D deficiency etc, it can be a pointer to disc infection like tuberculosis or due to bacteria.
Morning back pain may also signify onset of inflammatory back pain like Ankylosing Spondylitis.
Next Steps
Please consult a Neurosurgeon or Orthopedic surgeon. A proper physical examination is needed but in this period of lockdown online consult is an appropriate first step.
Health Tips
If pain does not resolve with a few days course of OTC (over the counter) painkillers like Paracetamol it is essential that you consult a doctor without fail.