Hello,
Squeezing the blackhead may invite secondary infections and this may cause infection which may need drainage. This may cause wide pores and scarring and hyperpigmented skin.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
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