What should I do for sore and aching arm muscles?

Soreness and aching in the arm muscles should first be addressed by getting adequate rest to allow the muscles to recover, along with properly managing exercise intensity. Stretching exercises, such as gentle tapping or massage, can help relax the muscles and alleviate pain. Applying topical analgesics like sodium diclofenac gel to the affected area may also provide effective pain relief. Additionally, it is important to focus on preventive measures, maintain sufficient sleep, follow a balanced diet, strengthen physical fitness, and enhance the body's immunity.