Severe knee pain for many days may be due to joint inflammation, strain, or an underlying condition that needs proper care. Rest your knees, avoid heavy activity, and use a warm compress to reduce stiffness and pain, and try gentle movement as tolerated. Maintain a healthy weight and avoid sitting or standing in one position for long. As the pain has been ongoing and is severe, it is important to get examined so the cause can be identified and treated properly.

Severe pain in the right arm with difficulty moving may be due to muscle injury, nerve irritation, or a joint problem, and requires proper attention. Rest the arm, avoid any heavy use, and apply a cold compress for the first day or two to reduce pain, then a warm compress to relax the muscles. Keep the arm supported and avoid sudden movements. As you are unable to move it properly, it is important to consult a doctor to identify the exact cause and start appropriate treatment.

Mouth pain in children for a few days may occur due to mouth ulcers, minor infection, or irritation from food. Giving soft foods and ensuring the child drinks enough fluids may help reduce discomfort. Maintaining good oral hygiene and avoiding very spicy or acidic foods can also help the area heal. Consult a doctor if the pain continues or the child has difficulty eating or drinking.

Severe body pain can happen due to viral infection, fever, muscle strain, stress, poor sleep, vitamin deficiency, dehydration, arthritis, nerve problems, or uncontrolled medical conditions such as diabetes or thyroid disorders. Pain affecting the whole body may also occur after excessive physical activity, weakness, or prolonged illness. Proper rest, hydration, regular meals, and adequate sleep may help reduce body pain gradually. Warm compresses, gentle stretching, and light movement may improve muscle stiffness and circulation. Pain-relieving medicines such as Paracetamol are sometimes used for temporary relief depending on the cause and overall health condition. Eating balanced meals rich in protein, calcium, vitamin D, and iron may also support recovery and muscle strength. Avoid excessive physical strain and maintain proper hydration, especially if there is fever or weakness. Seek medical care if the pain becomes severe suddenly, is associated with fever, swelling, breathing difficulty, weakness, numbness, or continues for many days without improvement.