Sweating isn't exactly a bodily function one can control but the vast majority of people have the luxury of sweating when everyone else in the same hot car, same basketball team, or classroom is just as hot as they are.
That's not so for the 2 to 3 percent of people with the unpredictable, uncontrollable sweating of hyperhidrosis.
"Ever since I was in elementary school, I'd say probably second grade, I remember being in class and my hands just sweating as I worked, having my hand on a paper, and the paper being saturated from my hands sweating so much," Wendy Burke told ABC News' "Good Morning America" in 2004. "So, I mean it's really been something I've lived with almost all my life."
Burke said at first adults didn't believe her and doctors did not take her seriously. They said, 'Oh, you're just clammy.' Everybody blew me off."
Dr. David Pariser, current secretary of the International Hyperhidrosis Society, told "Good Morning America" that many hyperhidrosis patients suffer socially and practically from the condition.
"I constantly hear about patients who are having to change their shirt three to four times a day, who stuff diapers in the sleeves of their shirt under their arms to absorb the moisture, who only buy black clothes and wear multiple layers, who never wear tank tops in the summer because they're afraid of the embarrassment of the sweating," he said.
Pariser said the cause of hyperhidrosis is unknown, but doctors have found some effective treatments including sending electrical pulses through sweat glands and injecting Botulinum Toxin Type A, commonly known as Botox, to paralyze sweat glands.
For a rare disease that cripples the vocal chords ability to make the most common sound, spasmodic dysphonia has some notable speakers and politicians as sufferers.
"It's a very rare disorder, and there is really very little known about it -- especially back in the '80s and '90s," said Dr. Phillip Song, a laryngologist at the Massachusetts Eye and Ear Infirmary in Boston.
People with spasmodic dysphonia in the media, such as National Public Radio talk show host Diane Rehm, have helped bring spasmodic dysphonia to national attention.
But few people knew what was wrong when Lorraine Rappaport started noticing her voice changing back in the early 1980s while working as a school counselor in California.
"It came on gradually; it isn't like anything that happens overnight," said Rappaport. "My voice got very hoarse, and there were certain letters of the alphabet at the beginning of words that I could not say easily."
Slowly, her condition started to interfere with her job and her communication with others.
"There were times where I had to stop and think, because I wanted to avoid a word because I couldn't say it clearly." Rappaport started avoiding words that began with "h," "ch," "k" or "c" -- a difficult task in English. She had never heard of spasmodic dysphonia at the time, and physicians kept telling her the problem was psychological, especially since she was getting a divorce at the time.
But by the early 1990s, Rappaport found treatment for her condition in a National Institutes of Health clinical trial using Botox injections. The NIH flew her to Maryland from California to receive the low-dose injections, and she started to see an improvement.