What is a primary symptom of interstitial cystitis?

A primary symptom of interstitial cystitis is severe pelvic pain. This condition, also known as painful bladder syndrome, is characterized by chronic bladder pain and discomfort, which can significantly affect a person's quality of life. The pain is often described as a feeling of pressure, aching, or tenderness in the bladder area, and it may be coupled with urinary frequency and urgency.

In contrast, other options presented do not align with the hallmark features of interstitial cystitis. Excessive thirst is typically associated with conditions affecting fluid balance, such as diabetes, while increased appetite is not a symptom related to the bladder. Night sweats are commonly linked to other medical issues like hormonal changes or infections, rather than being a primary symptom of interstitial cystitis. Therefore, severe pelvic pain stands out as the key characteristic that defines this disorder.