Hi.. Can understand your concern... As per your complain red bump after nose piercing occurs as a result of trauma to the surrounding soft tissues when the needle or the sharp thing that knocks through the tissues to create a hole in the nose.. The injury causes inflammation of the tissues leading to pain,lump formation and increased temperature in that area.. It can lead to formation of a scar tissue in that area treatment should be done for prevention and relief.. Apply warm saline packs over the area.. Dip a sterile cotton in luke warm saline water and apply over the area and keep for a few seconds.. Do for 3 to 4 times a day.. In case of pain you can apply a steroid based cream for relief.. Over the counter anti inflammatory painkiller like Ibuprofen can help in reducing inflammation and pain.. Do not try to change the nose pin or ring till the inflammation subsides.. At times if the swelling begins to get a white centre and softens there may be infection leading to abscess formation.. In that case antibiotic oral intake and antiseptic ointment application has to be done.. Hope this information helps.. If you find the answer helpful please write a positive review and click on find this answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora.