Streaming HD movies can be legal or illegal, depending on the source of the content. If you are streaming from a legitimate source such as a licensed streaming service like Netflix, Amazon Prime, or Hulu, then it is legal. However, if you are streaming from unauthorized sources that distribute copyrighted content without permission, then it is illegal. It is important to be aware of the source of the content and ensure that you are accessing it through legal means to avoid any legal issues. **

Headaches from watching a high-definition television can be caused by several factors. One possible reason is the flicker effect from the screen, which can strain the eyes and lead to headaches. Additionally, the brightness and contrast levels of the TV may be too high, causing eye strain and discomfort. Another factor could be the blue light emitted by the screen, which can disrupt sleep patterns and contribute to headaches. It's important to take breaks, adjust the settings, and consider using blue light filters to reduce the likelihood of experiencing headaches while watching HD television. **

In chronic headaches, the pain is often persistent and can vary in intensity. It may feel like a dull ache, throbbing sensation, or pressure in different areas of the head. Some individuals may also experience sensitivity to light and sound, nausea, and difficulty concentrating. Chronic headaches can significantly impact a person's quality of life and may require ongoing management and treatment. **

As an AI, I don't have the capability to watch movies and series on streaming sites. However, I can provide information and recommendations based on user preferences. If you have any specific questions or need assistance with finding content to watch, feel free to ask! **

Headaches can be caused by a variety of factors, including stress, tension, dehydration, lack of sleep, poor posture, and certain foods or drinks. Other common causes of headaches include sinus congestion, eyestrain, hormonal changes, and underlying health conditions such as migraines or high blood pressure. Identifying the specific cause of a headache can help in finding the most effective treatment or prevention strategies. **

Sudden headaches are headaches that come on quickly and unexpectedly, often without any warning signs. They can be intense and debilitating, causing sharp or throbbing pain in the head. Sudden headaches can be caused by a variety of factors, including stress, dehydration, lack of sleep, or underlying health conditions. It is important to pay attention to sudden headaches and seek medical attention if they are severe or persistent. **

Sneezing itself does not directly cause headaches. However, in some cases, the forceful nature of a sneeze can trigger a headache in individuals who are prone to conditions like migraines or tension headaches. This is known as a "primary cough headache" or "primary exertional headache." If someone consistently experiences headaches when they sneeze, it is recommended to consult a healthcare professional to determine the underlying cause and explore potential treatment options. **

There are several strategies that can help alleviate headaches. Some common remedies include getting enough rest, staying hydrated, practicing relaxation techniques such as deep breathing or meditation, applying a cold or warm compress to the head or neck, and taking over-the-counter pain relievers like ibuprofen or acetaminophen. It's also important to identify and avoid potential triggers such as certain foods, stress, or lack of sleep. If headaches persist or are severe, it's advisable to consult a healthcare professional for further evaluation and treatment. **