My sister had a ceaserean section 11 days ago,they used spinal tap anaesthisia bc she had a low platelet count.she is 26 and no history of aby other diseases or alllergies.she has started to fill unwell for past 5 days; she gets night sweats till her sheets get drenched,she gets dizzzy and has headaches,she gets very cold during the day and says she feels pain on touching her skin.the incision sight looks fine with no pus,her urine is ok as she did a urine test and they just did a blood test and say they will give her IV antibiotics through the night to fight any possible infection.she felt some hip pain yesterday and the area just below the incision is swollen abnormally.she says incision site feels painful to touch .what could this be? On her last pre natal visit,she was given a clean bill of health