yes you can take sour fruits... add more fruits to your diet ,because they contain fibers .which help your daily easy bowel movement..and sour food contain vitamin c which promote good digestive health it convert fat into energy...

Sour food by itself doesn't aggravate piles except you observe so in your case, you can restrict.

Hello I understand your concerns We have many good homeopathic medicines for piles or haemorroids to treat it completely from the root itself without any sideffects that are part of conventional medicines please contact me directly or ask me at dramisha.com Online consultation and medicines at your doorstep also available nationally and internationally Warm regards Dr Amisha Mirchandani 09819      055014

Please do consult your doctor , most of the medicines and their applications don't have any restriction to sour things.. but certain treatments certain times call for specific restrictions. It's better to ask the doctor who is treating you.