my father is suffering from strange illness like he is not getting hungry,same problem happened 5 years ago.then doctor did all tests like scanning, liver functionality,blood tests and said he is having simple cysts in liver but they r not chronic .Iillness is due to drug reaction.they treated and then he was fine but now after 5 years he again got the same problem like nervous,slightly headache and he is having acidity problem.doctor did scanning of digestive system, liver functionality,kidney functionality and chest x-ray ,blood tests.all is normal except ESR rate is high like 103 mm/hr.Can u please suggest what is happening exactly with him i am very thankful to you.