Question: why does it burn when my husband ejaculates inside me?
Answer: But before you rush into assuming you're suffering from a semen allergy, make sure you're not misdiagnosing your symptoms. Dr Bajekal is quick to note that semen allergies are rare and overdiagnosed. More common causes of pain and burning after sex are vaginitis, a yeast infection, an STI such as herpes, or vulvodynia.