1. Tongue:
- Normal coating: A thin, white coating on the tongue is normal. It's made up of dead cells, bacteria, and food debris.
- Oral thrush: A thick, white coating that covers the tongue and/or the inside of the mouth may be a sign of oral thrush, which is a yeast infection.
- Leukoplakia: White patches on the tongue that can't be scraped off may be a sign of leukoplakia, which is a pre-cancerous condition.
- Geographic tongue: A condition characterized by red, smooth patches on the tongue that are surrounded by a white border.
2. Skin:
- Eczema (atopic dermatitis): A common skin condition that causes dry, itchy, and inflamed skin.
- Psoriasis: A chronic skin condition that causes red, scaly, and inflamed skin.
- Tinea versicolor: A fungal skin infection that causes light or dark brown, scaly patches on the skin.
- Vitiligo: A condition in which the skin loses its pigment, causing white patches to appear.
3. Stool:
- Normal color: Stool is usually brown in color.
- Pale stools: Pale, or light-colored, stools can be a sign of liver problems, gallbladder problems, or a blockage in the bile ducts.
- White stools: White, or clay-colored, stools can be a sign of a severe liver infection or a blockage in the bile ducts.
- Black stools: Black, or tarry, stools can be a sign of upper gastrointestinal bleeding, such as from a stomach ulcer or esophageal varices.
4. Urine:
- Normal color: Urine is usually light yellow in color.
- Cloudy urine: Cloudy urine can be a sign of a urinary tract infection (UTI) or kidney stones.
- White urine: White, or milky, urine can be a sign of a urinary tract infection (UTI), kidney stones, or a condition called chyluria, which is the presence of fat in the urine.
- Red or pink urine: Red or pink urine can be a sign of blood in the urine, which can be caused by a variety of conditions, including urinary tract infections (UTIs), kidney stones, or cancer.
