Some people who have muscle aches may notice the following symptoms alongside the soreness and discomfort in their muscles:
stiffness and weakness in the affected area
a bite mark
signs of infection, such as redness and swelling
Some of these symptoms, such as a very high fever or difficulty breathing, will require immediate medical attention.
If the cause of the ache is a strain, an injury, tension, or stress, people will usually feel discomfort in a particular area.
When aches occur throughout the entire body, this is more likely to be due to an infection, medication, or underlying illness.