Thank you for posting your question. Appendicectomy, or any surgery for that matter create a stress environment for our body. This leads to release of certain substances which cause a rise in body temperature. This manifests in the form of low grade fever. Also, since post surgery normal solid diet is not established and the patient is usually kept on liquid or semi solid diet for initial few days, softening of stool consistency and increased frequency of stools may be seen. Thus both the symptoms that you have mentioned may be a normal occurance following an uneventful Appendicectomy. However, if the fever spikes are found to be high, or the stool frequency does not normalize even after starting normal solid diet or if any other associated symptoms are seen like vomiting, abdominal distention etc. then prompt investigations for any complication is advised.