Painful Swelling In Neck And Shoulder. On Antibiotics For Throat Infection. Lump In The Neck. What Are The Causes?

hello doctor. i have swelling on my neck and shoulder , it was very pain full, i saw a doctor ,he give me the antibiotics .he told me it is trought infeaction.i have the medicain for one week .but no change. now it is more than 4 weeks. now still painning,i noticed small lump in between ear and neck. after tat i went to doctor he told to have medicine tor 2 weeks.all 3 week i have the antibiotic.but now slightly pain chainges.swelling still their. lump still their.pain still their in my trought and neck. wat is this cause,