The diagnosis of stress urinary incontinence is based on subjective symptoms and objective examination. The diagnosis consists mainly of determining the diagnosis and the degree of diagnosis. (A) Determining the diagnosis Purpose: To determine the presence or absence of stress urinary incontinence. Mainly based on: medical history and physical examination. 1. History: symptoms of urinary leakage related to increased abdominal pressure such as sneezing, coughing, laughing and exercise, i.e. “coughing and leaking, not coughing and not leaking”. Physical examination: general examination, including cognitive ability, physical activity and coordination; related neurological examination, including lower limb muscle strength, perineal sensation and anal sphincter tone examination; specialized examination should include whether there is infection in the vulva, whether there is prolapse of pelvic organs and its degree, pressure-induced test, routine urine examination, and urine bacteriological culture if infection is suspected; auxiliary examination should include urinary flow rate and residual urine determination, when stress urinary incontinence is accompanied by difficulty in urination or overactive bladder such as urinary frequency and urgency, urodynamic examination should be performed to clarify the functional status of the bladder urethra; record a continuous 72-hour urinary diary, and ICI-Q-SF score to assist in evaluating the severity of urinary incontinence symptoms. 3. To determine the diagnosis, other diseases need to be excluded at the same time. If the patient has urinary symptoms such as urinary frequency, urgency, painful urination, increased nocturia and hematuria at the same time, the possible coexistence of overactive bladder, genitourinary infection and interstitial cystitis should be considered; if the patient has difficulty in urination at the same time, the possibility of bladder neck obstruction or weak contraction of the bladder forcing muscle should be considered; the presence of prolapse of the pelvic floor organs also needs to be examined and confirmed at the same time. (B) Degree diagnosis Purpose: To determine the degree of stress urinary incontinence and to provide a basis for the choice of treatment. Mild: general activity and nocturnal incontinence, occasional incontinence when the abdominal pressure increases, do not need to wear urinary pads, does not affect the patient’s life and social activities; Moderate: frequent incontinence when the abdominal pressure increases and rising activities, need to wear urinary pads, affect the patient’s life and social activities; Severe: incontinence when rising activities or lying position change, seriously affect the patient’s Severe: urinary incontinence when standing up or changing position, which seriously affects the patient’s life and social activities. 2. Judgment according to urine pad test Wear dry pre-weighed urine pad and measure the weight of urine pad after 1 hour: weight gain less than 1 gram is mild; weight gain between 1 gram and 10 grams is moderate; weight gain between 10 grams and 50 grams is severe; weight gain greater than 50 grams is very severe.