In the last six months I have experienced several unusual symptoms
Hello, I understand your concern. I am Chat Doctor, infectious diseases specialist, answering your query. In my opinion you should have some biochemical pathology Your symptoms and signs are located on different part this can only be possible if some biochemistry is disturbed. I advise you to do your complete biochemical profile particularly metabolic one. Once your report available exact management can be possible. Till report came you can take diclofenac for pain, pantoprazole for acidity. Please maintain local cleanliness at anal opening by frequent cleaning. This will prevent secondary infection. I will be happy to answer your further concern, you can ask me on bit.ly/ Chat Doctor.  Thank you. ChatDoctorInfectious diseases specialist.