My 18-month-old son started walking very early (10 months) and has always been a climber. During some of his adventures, he s has had some nasty falls. He ended up with a concussion back in December and had a clean cat scan, but was hospitalized overnight for observation. Now everyone he bumps his head, no matter how minor, he will get these noticeable knots/bumps. Should we be concerned about these bumps? He has some severe language delays (suspected apraxia).
Regarding language development there is a lot of variability, most toddlers are saying about 20 words by 18 months. If at 18 months your child is using gesture instead of vocalizations to communicate then you should consult speech and language pathologist for detailed clinical evaluation and investigations. Regarding head bumps, are these bumps appearing only on head or anywhere else after minor trauma. As you said CT scan following previous head injury was normal, possibility of most of the internal injuries is ruled out. Bruising after minor trauma may be a sign of blood disorder. Consult your doctor and ask for investigations like CBC, coagulation studies.