Why is my tracheotomy itching many years after?

May have tracheitis: You may have a low grade infection (tracheitis or cellulitis) of the tracheal stoma. You may also have a allergic reaction to something locally. Has anything changed in your routine? If there is any redness, warmth, or fever, go and see your specialist to evaluate the area.

Likely yeast : It is common for trach stomas to get a yeast infection around them, which can cause intense itching. See your doctor as this is very easily treated with ointment.