Why do my followers keep dropping on Instagram?

It could be for any of these reasons:

1. The quality and frequency of your content has decreased.
2. Some of your followers weren’t really interested in you in the first place, they only followed you to get follow backs in a manual or automated manner.
3. You had fake followers (whether intentionally or not) 
   and Instagram have deleted their accounts.

Bot activity can also be the reason behind this. Every day I get comments, likes and follows from people that
are using automated resources to gain followers (things like auto following or
auto liking anyone who uses a hashtag). These practices create shifts in your
follower count.

Using bots can cause both positive and negative effect on
your account. If you are using bot from a company
that are providing well automated functional bots, then that might help your account.
If not, then you are in trouble.

To avoid that:

• Make sure you keep your content high quality and frequent.
• Have quality traffic sources that drive users to your account
      that are likely to like your Instagram and follow you for legitimate reasons. Try participating in conversations on your niche and using 
  adequate hashtags.
• Use bots from trusted sources to increase your followers.
• You can buy instagram likes and followers from trusted sources to increase your following too. Buying likes and followers will help you a lot after losing a lot of followers. Promoting Team is one of the best website to buy likes and followers. So if you are interested then go check them out.

Most likely because they are fake and Instagram is removing them after a spam update. My little sis bought 10k followers from Wizish and 500 dropped a week later... That's what she gets lol

It may be due to posting of irrelevant stuff by yourself, you should review your strategies and try to post informative stuff to get your followers back.

May be you bought followers from the internet and those are fake followers.

Or you have not active on Instagram and posting low quality content that's why lossing followers.

Probably things you posted didn't arouse more interest of your followers. They might be attracted by one of your posts and then follow you. But you don't continuously provide something really interesting or interact with your followers more often, then the figures drop.

There are several reasons due to which followers dropping on any Instagram account. Some of the reasons are mentioned below:-

1. You may be posted irrelevant content from your account.

2. You may be had fake followers.

3. Your followers are not interesting to you or your post.

I know It's quite difficult to manage account when your followers are dropping. In that situation, you can buy Instagram followers from that agency who deal with real Instagram followers. It will help you a lot to maintain the dignity of your account.

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If you worry about dropping of followers but you consider your content as a good one then is it so serious? I mean, if you need to get more and more followers to promote your account then it's a different story. Read how to buy Instagram likes with credit card and enjoy good results.

Try to check whether you have the three reasons:

1. The quality of your post is decreasing.

2. The frequency for you to publish your post is decreasing.

3. There might be some fake followers of your account.