Alzheimer's Disease Archive

There are several types of "sun allergies," including polymorphous light eruption (PMLE), hives, and photoallergic reactions. Learn about these different reactions to sun exposure, as well as prevention and treatment.

Long-established treatments for essential tremor, such as medication and deep brain stimulation surgery, have been joined by a leading-edge technique called focused ultrasound. This incision-free procedure aims sound waves at a spot deep in the brain responsible for tremors. While scientists study ultrasound's long-term effects, the procedure is currently used to treat shakiness on only one side of the body. Other common causes of tremor include Parkinson's disease, caffeine, alcohol withdrawal, anxiety, and fatigue.

A 2022 study found that people who recover from COVID-19 face significantly higher risks of developing type 2 diabetes than those who had short-term upper respiratory tract infections, which are often caused by other viruses.

Most people have eye twitches at some point in their lives. These are usually a sign of minor physical or mental stress. Spasms can be calmed with a warm compress, sleep, or exercise. People should see a doctor if one or both eyes close involuntarily with spasms.

Hiccups are sometimes triggered by emotional stress such as surprise, fright, or nervousness. People can try to stop hiccups by holding their breath for five to 10 seconds, breathing into a paper bag, or sipping ice water. Occasionally, hiccups signal other conditions.

A review of studies published online April 13, 2022, by JAMA Psychiatry found that people who did 75 minutes per week of moderate-intensity exercise, such as brisk walking, had an 18% lower risk for depression, compared with people who didn't exercise.

Brain damage can cause the language disorder aphasia. It affects a person's ability to understand or produce speech. Coping with aphasia requires treatment for the underlying cause and speech therapy to learn how to communicate despite language deficits. If the cause of the aphasia improves, so may the aphasia. But many people will continue to live with some level of aphasia, especially if the cause of brain damage is a progressive disease, such as Alzheimer's.

Seasonal affective disorder, or SAD, is less common in summer, but a seasonal pattern of depressive symptoms can occur despite exposure to many hours of daylight. Many summertime SAD symptoms resemble overall depression markers, but eating and sleeping patterns can deviate. People can combat summertime SAD by sticking with antidepressants and psychotherapy, maintaining routines, exercising, and taking a break from social media.

People with knee osteoarthritis often gain temporary pain relief from joint injections. However, there is uncertainty about long-term risks of steroid injections. A 2022 study suggests that the risk may be minimal if these injections are done infrequently.

Ticklishness falls into two categories: gargalesis (which produces laughter and squirming) and knismesis (the sensation of a feather brushing over the skin, also known as light-touch tickling). It is not clear why some people are ticklish, but it may be a bonding or protective reaction.