There’s quite detailed info in the Newbies Guide Section ‘ES Info- Symptoms’,& it explains all the different nerves which can be irritated by styloid processes, & the symptoms that can cause. Heart arrhythmia can be caused by irritation of the vagus nerve, but depending on the length & angle of the styloid it’s not always involved, so it is possible to have ES without any heart problems. It could be a vascular symptom too if one of the carotid artery sinuses is irritated, but not everyone has vascular ES. Ear pain & facial pain/ tingling can be caused by irritated nerves- nerve pain medications can help with this, & hopefully surgery will improve this. Off balance feeling could be one of the nerves to the ear being irritated, or otherwise it could be a vascular symptom- did you have a CT with contrast to see if any blood vessels are affected? Eye pain can be again from the Trigeminal Nerve, but can also be a vascular symptom.
The tingling in your hands may or may not be ES- the accessory nerve can be affected which can cause pain in the shoulder & arms, & weakness, but this is less common.
No doctors give 100% guarantees about the surgery, that would be irresponsible as sometimes nerves can have been badly damaged & may not totally recover, & sometimes it’s very difficult to remove all the styloid if nerves are very close. There are risks from surgery, but equally this won’t go away, it’s the only ‘cure’, & if left in the styloids can keep doing damage. But you can improve the risks by seeing an experienced surgeon, making sure as much of the styloid is removed as possible, & also the tip smoothed off.
Has your doctor got much experience? We have a list in the Doctors Info section- if you can travel, Dr Cognetti in PA is very experienced, or Dr Mark deLacure NYU has done several surgeries recently.
I hope this helps!