My mother age is 42, she was suffered from leg swelling and slight heart pain, we admitted her in hospital, doctor said it was a left enlarged heart and treated 2 weeks, and legs became normal .and continuing medicines. After 1 week she got fever ,used paracetamol and fever last for 4 days, doctor said pulse cells are more in urine test it is infection when she got fever ,after 1 month pf discharge ,now she is having lower left back pain at nights, is it because of medicines or any other maybe? But now she is having lower back pain.