Brief Answer:
Inflammatory swelling!

Detailed Answer:
Hi

I went through the query and understood your concern.

Unilateral swelling of face after an episode of ear swelling and redness suggest the cause may be most probably due to inflammation. Since unilateral the systemic cause can be ruled out.

For you high dose aspirin may help as anti inflammatory agent or else drugs like ibuprofen or aceclofenac will help for inflammatory features. The cause for the ear problem should be looked for and if infected then needs antibiotic treatment. Since this is prescription drug you need to consult your doctor. For cold anti histamine drug like cetrizine or loratidine will help you.

Till then you can take anti-inflammatory drug as explained and give cold compression. These will help you.

I hope this information answered your query and helps you.

Feel free to ask for any further query and I will be glad to answer them.

Wish you good health.

Regards

---