6mth old had shots yesterday, today she has a 100.4 degree fever what can i give her to help bring it down? anything else i need to watch for?

Ok: Fever in a 6 month old that is otherwise doing well can be treated with Tylenol (acetaminophen) alternating with Motrin each every 6 hours . You can stagger it to every 3 hours switch to the other medicine so you can have a good chance of getting the fever down. Cold compresses to the body can help as well. Notify you pediatrician this is happening so they can see you soon. Seizures can happen so be wary

Ibuprofen: Ibuprofen (Advil&Motrin) are good anti-inflammatory pain relievers that are safe to use every-8 hours for a few days. The usual dose is 100 mg per 22 pounds, or 10 mg/kg per dose. Symptoms of adverse vaccine reactions (VAERS) requiring urgent action are listed in handouts usually given at the office during appointment. These include extreme irritability, seizures, high fevers, allergic reaction

Fever with shots: Fever is an expected side effect from vaccines. The usual recommendation is to treat a fever of 102 or higher. If she is fussy and not eating well,or the injection site seems like it is bothering her, some acetaminophen may help. These symptoms usually last only a day or two, any longer then get her rechecked by her Doctor.