My LO came with me to a personal doctors appointment today and while I was sitting in the waiting room with him on my lap I was rubbing his head and felt a lump on the lower part of his head, on the left hand side. Since I was in the perfect place to ask, I asked my doctor to take a look. He suggested that it was likely fluid build up, which he claimed was common and could be from sleeping on the same spot. He told me to try and prop him up on the opposite side if I could for sleeping and to keep an eye on it. He took measurements and checked out the rest of his head and didn't seem concerned. Wondering if anyone else has had anything like this. Of course my mind is wondering and I fear worse things. As I was rocking him tonight I noticed that it isn't even on the side that he generally lays on, though that spot does hit my arm when I feed him his bottle. Wondering if that could be it. My mind is racing with fears of it being something else. We have his 6 month appointment next Tuesday so I plan to get a second opinion then. Hopefully she can put my mind at ease and that changing positions will help the lump go down.