Hello and welcome,
The swelling without pain is likely due to allergic cause. Any swelling, since it causes pressure on the muscles and nerves can cause numbness and discomfort on carrying things. The other causes for consideration with your symptoms would be;
1) Very mild subcutaneous tissue infection / inflammation.
2) Superficial thrombophlebitis; this is blood clot in the superficial veins and is not dangerous as the clot in the deep veins are, as they heal without complications, almost always.
3) Lymphangitis; lymphatic vessel inflammation; again is quite uncommon.
Please feel free for your follow up questions.
Yes, the blood tests like d-dimer can detect the blood clot. An ultrasound (colored doppler study) too is done for the evaluation. With a bruise developing, a further evaluation is warranted.
It is privilege assisting you.
A superficial thrombophlebitis heals in 5-7 days. If you develop, pain, redness, warmth, soreness, tenderness, it would need immediate evaluation.
Yes, the ice should help you in symptoms. If it is tensing the muscles, you may skip it. Motrin should decrease the swelling by it's anti-inflammatory action.
Do you want another expert's opinion on it. If yes, I will opt out.
It can take sometimes up to 72 hours for any response to show. Please do not worry. It does not seem to be anything serious.
You are most welcome,
This might be a possibility. It can cause swelling, though pain is usually significant with the pulled muscle on movements.