Anal fissure causes knife-like pain lasting up to 15 minutes after bowel movements. Herpes simplex virus can produce similar knife-like pain. Piles cause nagging, aching discomfort during defecation. Abscess produces throbbing pain that worsens over days. Proctalgia fugax causes severe cramp-like pain lasting up to half an hour
Depression can have multiple complex causes, including brain chemistry and genetics. People may feel depressed without clear triggers or justifications. Perceptions of "good" life can make depression seem unjustifiable. People with depression often fear stigma and judgment from others
COPD is the fourth leading cause of death worldwide, causing 3.5 million deaths in 2021. Nearly 90% of COPD deaths under 70 occur in low- and middle-income countries. Tobacco smoking accounts for over 70% of cases in high-income countries
Phobias affect approximately 9.1% of U.S. adults annually. Women are twice as likely to experience phobias as men. Phobias typically emerge during childhood or adolescence
NSIP is second most common interstitial lung disease after UIP. Typically affects middle-aged adults (40-50 years). More common in women due to collagen vascular disease association. Smoking is neither protective nor risk factor
Pubic lice (Pthirus pubis) feeds on blood and lays eggs on pubic hair. Transmitted primarily through sexual contact, but can spread via bedding. Affects about 2% of worldwide population. More common in crowded conditions with close contact