Hi there, I am Dr. Deepak, I work in Emergency Department, where I see many patients with injury to their head. As you mentioned your son had injured his head from basket ball rim about 2 weeks ago. You have noticed a soft squishy lump which is getting larger. I feel your son had sustained minor injury to his head, I can say that as 1. he didn t had any dizzy feeling. 2. he didn t had vomiting even though you had nausea. 3. he didn t loose consciousness. 4. he are not feeling any numbness or weakness of any one side of your body 5. he are not having any bluish discoloration around your eyes and behind the ear 6. he are not having any trouble with walking. And the most important thing is, he is pretty much okay right now. The thing to consider about soft squishy lump is, when did it start? If it started on the day of injury then it may be caused by injury, which is normal and it might take 1-2 weeks for the lump to come down in size. but You have mentioned it is increasing in size. If it started now after 2 weeks of injury, then most likely it can t be caused by injury. Considering the fact that the lump is there for 2 weeks or it s increase in size. I would recommend you to show your kid to a Doctor, Who can tell better after the examination of the lump, what is causing it. Thank you Hope your concern was dealt with and hope your kid has a speedy recovery.