Occasionally I am facing the problem of gas and after that I suffer from severe headache which lasts long for 2-3 days. Also I had complaint of anal fissure in 2013 but now I can feel burning sensation in anus with blood oozing out sometime. Because I am working from home so I have to sit for long hours. I want to know what should I do for proper check up and who would be the right doctor to get consultation.