Is it normal for a baby to not have a rash?

Roseola is a common rash in infants and young children, and usually occurs before the baby is one year old. Because the baby no longer has the antibodies brought from the mother in his body, the baby will need to rely on himself to resist external diseases and bacteria. However, the baby is just beginning to develop and its functions in all aspects are not perfect, so it is easy to get sick, that is, roseola. So, is it normal for babies not to have had roseola?

Babies usually develop roseola infantum when they are around six months old. This is because the antibodies brought by the mother are basically used up, so the baby will get sick, and the first disease they develop is roseola infantum. Having roseola infantum will provide lifelong immunity. As for why some babies develop roseola infantum first, while some babies have never developed roseola infantum until they are four years old, it is because each individual is different and there is no comparability. There is currently no vaccination against Roseola Infantil available.

Babies are most likely to get roseola infantum when they are 6-18 months old. If the baby cries and makes a fuss after having a fever, parents must accompany the baby, hold the baby and play with him/her. The house should also be ventilated. Try to let the baby drink more water and make the milk powder thinner. After the rash appeared, Dingbao's appetite was not very good. It takes time to adjust. It took Doudou a week to really return to his previous appetite.

Roseola infantum, also known as roseola infantum, is an acute infectious disease in children caused by a virus. Clinically, it is characterized by sudden onset of fever and rash after the fever subsides. This disease was called "milk numbness" or "false numbness" in ancient times. It is caused by exogenous wind-heat evil, which accumulates in the skin and stagnates with qi and blood.

Etiology and epidemiology: The pathogen is human herpes virus type 6, the virus particles are spherical with a diameter of 200nm. Its nucleocapsid is a three-dimensional symmetrical icosahedron composed of 163 shell particles, with a core composed of double-stranded DNA inside and a lipoprotein envelope outside the nucleocapsid. Asymptomatic adult patients are the source of infection for this disease, which is transmitted through respiratory droplets. The fetus can obtain antibodies from the mother through the placenta. The antibody positivity rate is 25% at 4 months after birth, 76% at 11 months, 90% at 5 years old, and 98% at 17 years old. This disease is more common in children aged 6 to 18 months, and is rare after 3 years old. It occurs more frequently in the spring and autumn rainy seasons, with no gender difference.

Clinical manifestations: The incubation period of this disease is 7 to 17 days, with an average of about 10 days. The onset is acute, with a fever of 39-40 degrees. Convulsions may occur in the early stages of high fever. The patient may have mild runny nose, cough, and swollen eyelids. Conjunctivitis, during the fever period, there are symptoms such as poor appetite, nausea, vomiting, mild diarrhea or constipation, mild congestion in the pharynx, swollen lymph nodes in the occipital region, neck and behind the ears, the body temperature persists for 3-5 days and then suddenly subsides. When the fever subsides, light red macules or maculopapules of varying sizes appear, which fade when pressed. It starts on the trunk and quickly spreads to the whole body, with more cases on the waist and buttocks. The rash subsides in 1-2 days without pigmentation or desquamation. The enlarged lymph nodes disappear later, but there is no tenderness. During the course of the disease, the number of peripheral blood white blood cells decreases, and the lymphocyte classification count can reach 70%-90%.