DS 4 has had swollen tonsils for a week or so, he is fine in his self running round playing as normal, he hasnt had a temperature at all. Ive just bathed him and ive felt a small marble sized lump under his arm on just one side. The glands on his neck are also a little swollen. I will take him to see the GP in morning of course, but im a little worried, if its a swollen gland wouldnt the one under his other arm also be swollen?. Its a definite lump that you can get a hold off.