DOMS is not dangerous. It may feel uncomfortable, but the discomfort should subside within a week.
However, when experiencing DOMS, it is important to monitor your symptoms for signs of a more serious condition (e.g., rhabdomyolysis, muscle strains/sprains, or exertional compartment syndrome). If you are concerned about your symptoms, a consultation with a medical provider is advised. In addition, if the pain is moderate to severe, the recommendation is to be evaluated to rule out a more serious condition.
For example, if you are experiencing DOMS in conjunction with red/brown urine output, you may have rhabdomyolysis and should seek medical attention immediately. Rhabdomyolysis occurs when damaged muscle releases its intracellular contents into the bloodstream, causing kidney damage and electrolyte imbalances (which could result in cardiac arrhythmias).[1]