Treating insect bites

My LO has insect bites all over his feet up to ankles. We have a lot of spiders at home and in the garden, I am guessing it is those and not mosquitoes. There is a distinct bite mark and there is some swelling around it. Some of it is crusted over, others have a boil on top.
We do put K in full pants and full sleeved shirt (pajamas) for sleep, he does not like having his leg covered bonk. Pulls off the socks bonk He scratches at them all the time and is waking up multiple times in the night. I have changed the sheet and cleaned the bed, and yet. DH who has been sharing bed with K does not have it whereas me and K, while spending a lot of time in the garden have it!
Will calamine stop the itching?

 

Thanks mommies.
V, I have put a drop of calamine for the night, hope he does not scratch tonight. I was wondering if it is safe - one of DH's relatives said it is best not to use the Kaline substance even for adults ! The darn rains, it is bringing in all kinds of creepy crawlies.
Lalitha, I think I will use turmeric if he ends up infecting the damn bites with his scratching, till then I am a little weary because it does burn the skin a bit! Silly, but we dont have gingelly oil at home :rotfl. Just olive oil and rice bran oil. Does the oil act as a barrier (my sheets tho will suffer )
Raj, how does one use aloe, do you just break a frond and smear the gooey substance? I am constantly burning myself on the stove:hide:. The citronella we're growing is doing nothing to repel mosquitoes - I wonder if I am going about natural remedies the wrong way.

 

Why is that? Is that an issue, we have had no hives, allergies, fever or anything other reaction with the bites. It is not those poisonous bugs you get in the USA, just domestic spider. It seems a little silly taking him for insect bites.. Or am I being too casual here