How to treat redness below the knee while wearing black sweatpants

In general, redness around the knee area under black sport pants may be caused by factors such as trauma, contact dermatitis, allergic dermatitis, rheumatoid arthritis, synovitis, etc. Patients can receive symptomatic treatment based on the specific cause. The detailed analysis is as follows:

1. Trauma: External injury or trauma to the knee, such as severe impact, falling, or abrasions, may trigger an inflammatory response and lead to redness at the knee. Patients can take medications such as Huli San Capsules or Panlong Qi Tablets under medical guidance, while avoiding excessive fatigue.

2. Contact Dermatitis: If the knee comes into contact with toxic or irritating exogenous substances, inflammation may occur, resulting in symptoms such as redness and itching of the skin. Patients can use topical medications such as Mupirocin Ointment or Compound Dexamethasone Cream under medical supervision, while maintaining good hygiene of the affected area.

3. Allergic Dermatitis: Certain allergens may trigger allergic reactions leading to allergic dermatitis. In such cases, the knee area may become red, itchy, or swollen, often accompanied by other allergy symptoms like sneezing and runny nose. Patients can take antihistamines such as Cetirizine Hydrochloride Tablets or Desloratadine Citrate Tablets under medical advice, while avoiding exposure to known allergens.

4. Rheumatoid Arthritis: Rheumatoid arthritis is a chronic inflammatory joint disease that may affect the knee joints. Inflammation can cause joint swelling and redness, leading to redness around the knee. Patients can use medications such as Qingpeng Ointment or Diclofenac Sodium Sustained-Release Tablets under medical guidance, while keeping the joint warm.

5. Synovitis: Synovitis is an inflammation of the synovial tissue that may affect the knee joint. It can cause joint swelling, pain, redness, and functional impairment. Patients can take medications such as Methylprednisolone Tablets or Ibuprofen Tablets under medical supervision, while avoiding overexertion.

Besides the above causes, other conditions such as gout or fractures may also be responsible. It is recommended to seek timely medical evaluation and treatment.