Hi.. Welcome to HEALTHCARE MAGIC.. As per your complain of you have an abscessed tooth then swelling is due to pus accumulation in the soft tissues.. Doing crystal meth can cause increased inflammation and will cause Excess swelling and pain.. I would suggest you to consult an Oral Physician and get evaluated and a thorough clinical evaluation and investigations like x ray will help in diagnosis and treatment will be done accordingly.. As of now do cool compresses over the swelling and take anti-inflammatory painkillers like Ibuprofen.. Hope this helps.. Regards..