Hi thanks for writing to healthcare magic. Soft bump with red spots in a 3 month old baby is suggestive of haemangioma.A hemangioma
is a benign swelling of the endothelial cells that line blood vessels and is characterised by increased number of normal or abnormal vessels filled with blood. It usually appears during the first weeks of life and It is common in infancy. . Hemangioma grows very quickly up to 12 months of age and then there is very little change in it's appearance for 1 to 2 years of age and then it will start regressing.It will completely disappear by the age of 5 to 7 years of age. So my advise is not to get panic about it.Only thing for concern is ,it may get ruptured causing bleeding and secondary infection.You can consult your doctor in such situations.Take care .