Welcome to Healthcaremagic forum,
According to your description it seems like it has lead to irritant dermatitis
with secondary infection ,since you had popped the lesion and used tea tree oil.
You should immediately take oral antibiotic for this as the infection seems to be spreading. You should consult a dermatologist
as soon as possible for proper prescription and treatment. Later on once the lesions subside you can use a topical steroid
to take care of the irritation.
I hope this answers your query,
wish you good health,
Senior Dermatologist .