Thanks to HCM
I can understand your father concern
don't worry ,being an old age body immunity power will be low
here fever and chills and pain in left side of abdomen indicates the
kidney issue
so I would like to suggest you ask him is there any difficulty in passing urine or not
better have a
ultrasound abdomen to check the status of intra abdomen organs like kidney,
prostate and bladder
infection either of these organs may lead to above symptoms
plz let him take antipyretics like
paracetamol 500mg thrice daily,antibiotic like
cefixime 200mg twice daily along with plenty of water may reduce the symptoms
plz do the CBP.RBS.ESR.RFT FOR further management also
having these reports consult your family doctor or HCM
OK DONT WORRY .it will subside .