Lower eye lid swelling of my daughter

My daughter is 4.5 years old and I've observed her eye (left) lid swells every time she catches cold (which is also very often). And the problem is, swelling remains for 4-6 weeks even after cold getting over.

Some history of her last bout with cold/ear/eye infection -
6 months back, she had suffered an ear (left) infection due to severe cold and my local homeopath's medicine worked. She had eye swelling at that time also. Medicines given were -

1. Merc Sol - 30 (before meals)
2. Belladona - 200 (after meals)
3. Silicea - 6x (after meals)

with a gap of 30 mins between medicines and food.

With these medicines, I could see her cold getting over also the ear infection. A follow up session with the same doc confirmed that.
At this time I could see her eye lid swell further (much larger than usual) to eventually burst and getting all right.

I think Merc sol and Silicea were for eye and Bellandona for cold.

After this episode, I got introduced to homeopathy and am able to cure her cold with the help of Belladona, Bryonia.

But this time, I could see her cold going away but eye swelling is just not getting over, though getting diminished very slowly.
This time also, I gave Mer sol and Silicea (30x, I couldn't get 6x-silicia) for a week and saw her lid swelling NOT bursting as in past but diminishing to a very small red bubble.

So the current problem/situation is-
1. Her left eye's lower lid has a small red bubble since last one month.
There is no discharge of any sort (not in past also).
This red bubble was big earlier and has dimished considerably (1/3rd of the original size).
2. She's caught cold during this time also, but that got over with Belladona, but swelling remains.
3. Her right eye is just fine.
4. She is pretty cheerful and very friendly with people of same age and adults.
Can play with anyone.
5. She drinks milk and eats other milk products.

Kindly help.

Thanks.

Pawan