<s>[INST] It is possible to have appendicitis that does not so up on a blood test? I have been in a lot of pain in my lower abdomen, the doctors thinks it is either polycystic ovaries, or appendicitis. I have to wait for a ultrasound, bit in the mean time I am unable to work due to the pain. Can I have any other tests, or could it be anything else? thanks [/INST] Hello, Thanks for the query to Chat Doctor. Forum. If I were you treating doctor for this case of severe pain in the lower abdomen right side (not mentioned in query, if pain is on left side than rule out appendicitis)., I would come up with these possibilities, This includes, 1 Appendicitis, usually associated with excruciating pain (acute cases) with vomiting and fever. Diagnosis can be confirmed by palpation of the pain at a fix point by a surgeon by physical examination so get it be examined by a surgeon, thereafter, if, necessary tests as ultrasound. 2 Ovarian cysts may be cyst on the right side, this also causes excruciating pain in few cases, diagnosis can be confirmed by gynecologist. 3 The last possibility is of any stone in urinary system, which may present such sharp pain. Ultrasound will find out the exact nature of disease. Till take painkillers and antibiotics if fever present. Good luck. </s>