 [ Symptoms ] what is stuck in my ribs  when i stand up from bending over and sometimes just from sitting i get a painful cramp in my right rib cage that feels like something is stuck or lodged between my ribs i have to stretch and push down on my ribs to relive the pain it is happening more often than usual and kinda scares me [ Disease ] the ana antinuclear antibody  is a blood test that when positive is associated with autoimmune diseases the prototype of which is lupus sle a + test by itself titer >1160 does not define sle since one needs to have the signs and symptoms associated with the disease thus the test has to be interpreted in the context of the individual as evaluated by the doctor the test can be falsely + i e + in a patient who does not have the disease about 10 or + in other conditions such as scleroderma sjogren is syndrome to name a few if the test is negative the likelihood is that you do not have lupus since there are way fewer false negatives than false positives if your doctor however thinks that you do have lupus by signs and symptoms despite the negative ana some other tests may be done by your md finally the ana test is not done to follow the activity of the disease so it is unneccessary to continue to repeat it 