Girls, here's the situation: this morning my child (5 years old) woke up complaining of neck pain on…

Girls, here's the situation: this morning my child (5 years old) woke up complaining of neck pain on the side. We initially thought he slept awkwardly and slept on it, as we didn't feel anything on his neck. But when I picked him up from kindergarten after his nap, he said it still hurt. At home, I examined him again and felt a small lump on the side of his neck, like an inflamed lymph node. What do you do for inflammation? How is it treated? We're going to the doctor tomorrow, but my past experiences with doctors haven't been great, so I just want to understand what they should prescribe and what to check for... Is there anything I can do for the pain before we see the doctor? Just ibuprofen or a suppository? (Ibuprofen because he won't drink syrup 😢)