Baby foot and neck bumps may be associated with mosquito bites, contact dermatitis, common warts, molluscum contagiosum, hand, foot and mouth disease and so on. 1. Mosquito bites: If the baby’s ankle is bitten by fleas, mosquitoes, etc., it will cause red bumps at the ankle, accompanied by itching symptoms. 2. contact dermatitis: because the baby’s ankle skin is relatively tender, if contact with irritating or allergic things, it is easy to occur skin inflammation reaction, red patches and papules, will also be accompanied by itching symptoms. 3. common warts: common warts are mainly found in the limbs of children and adolescents, mostly associated with human papillomavirus infection, the initial manifestation of the pinhead size of the flat pimples, will gradually progress to become as large as the size of soybean grains, and is not accompanied by itching or pain. 4. Molluscum contagiosum: If the baby is infected with the molluscum contagiosum virus, it will be manifested as a hemispherical skin-colored pimple without pain or itching, and can be squeezed out of the molluscum contagiosum, the lesion of the skin is scratched and ruptured in the normal skin after the emergence of new molluscum contagiosum. 5. Hand, foot and mouth disease: If children infected with enterovirus appear hand, foot and mouth disease, not only will have fever, but also accompanied by herpes on the hands, feet, mouth, buttocks, the initial stage may be red pimples, the center of the lesions for the size of a small rice grain blisters, can be in one part or more parts of the appearance. Therefore, there are more reasons for babies to have bumps on the neck of the feet, parents should pay close attention to the changes of the bumps and other uncomfortable symptoms, if the symptoms have not been relieved, you should seek medical attention in a timely manner.